p******n
发帖数: 156 | 1 Qualcomm 失败面经,虽然失败了,还是帖出来于大家共享之,另外也求大家帮我分析下原因
周一电面了qualcomm,面完还挺高兴的,因为自我感觉良好,只有一个问题没答上来.虽然
有点遗憾,因为这个问题还挺基
本的.但还是很自信可以有下文的.没想到两天后就收到了据信.
以下是面试全过程.希望大家帮我分析下失败原因.
印度人面的我.句子听不太懂.但是关键词绝对没错,因为都是自己本专业的,所以很敏感
而且我还重复了一下他的问题,他
都答没错.
Position: System engineer - PHY-MAC layer, all levels needed
My degree: Master of Electrical Engineering.
Q: introduce your self
A:Balabala,
Q: I want to ask some questions about OFDM
A:Sure(most of my research is about MIMO and CDMA, why OFDM).
Q: What’s the advantages of OFD |
p*****r
发帖数: 525 | 2 I think your answers are OK.
Qualcomm is kind of BT. I have been there for on-site.
feel good, also failed.
Just too many competitors. |
d*********r
发帖数: 227 | 3
right. They might have top candidates already based on resume. Phone
interview is just verify that those top candidates are not 水货。
【在 p*****r 的大作中提到】
: I think your answers are OK.
: Qualcomm is kind of BT. I have been there for on-site.
: feel good, also failed.
: Just too many competitors.
|
w*******d
发帖数: 3714 | 4 我去onsite被鄙视过，哈哈，没事，你是中国人（而不是印度人）本身已经是劣势了，
不用想太多～ |
k*******d
发帖数: 1340 | 5 感谢楼主share 面经，我觉得楼主的回答都挺不错的啊 |
j******a
发帖数: 1599 | 6 nnd,都忘了。要是问我肯定答不出来了
原因
【在 p******n 的大作中提到】
: Qualcomm 失败面经,虽然失败了,还是帖出来于大家共享之,另外也求大家帮我分析下原因
: 周一电面了qualcomm,面完还挺高兴的,因为自我感觉良好,只有一个问题没答上来.虽然
: 有点遗憾,因为这个问题还挺基
: 本的.但还是很自信可以有下文的.没想到两天后就收到了据信.
: 以下是面试全过程.希望大家帮我分析下失败原因.
: 印度人面的我.句子听不太懂.但是关键词绝对没错,因为都是自己本专业的,所以很敏感
: 而且我还重复了一下他的问题,他
: 都答没错.
: Position: System engineer - PHY-MAC layer, all levels needed
: My degree: Master of Electrical Engineering.
|
k***d
发帖数: 536 | 7 I don't know why you fail, but i think you need to know much more about OFDM
, that is on which QCOM's future depends, it is one of the core patent
claims QCOM has, you need to be familiar with it. |
p******n
发帖数: 156 | 8 能否说得详细点,我的确对ofdm了解的不多.因为我一直都是在作mimo方向的研究.ofdm
是本科毕设的事情了
OFDM
【在 k***d 的大作中提到】
: I don't know why you fail, but i think you need to know much more about OFDM
: , that is on which QCOM's future depends, it is one of the core patent
: claims QCOM has, you need to be familiar with it.
|
p******n
发帖数: 156 | 9 that's fine. if you prepare, maybe you will perform better than me
【在 j******a 的大作中提到】
: nnd,都忘了。要是问我肯定答不出来了
:
: 原因
|
f*********t
发帖数: 37 | 10 Thanks a lot for sharing those questions, Those answers are really good.
Maybe there are a little more to say for the cyclic prefix.
According to the answer leave the cyclic prefix part to be bland, ISI can
also be avoided. In real multipath environment, we cannot leave the cyclic
prefix to be blank.
I don't think this is the reason that they didn't give you onsite. Qualcomm
is very BT. I just want to dicuss if there are any better answers for those
questions.
【在 j******a 的大作中提到】
: nnd,都忘了。要是问我肯定答不出来了
:
: 原因
|
|
|
T******T
发帖数: 3066 | 11 good discussion guys, learning just by reading :)
Qualcomm
those
【在 f*********t 的大作中提到】
: Thanks a lot for sharing those questions, Those answers are really good.
: Maybe there are a little more to say for the cyclic prefix.
: According to the answer leave the cyclic prefix part to be bland, ISI can
: also be avoided. In real multipath environment, we cannot leave the cyclic
: prefix to be blank.
: I don't think this is the reason that they didn't give you onsite. Qualcomm
: is very BT. I just want to dicuss if there are any better answers for those
: questions.
|
p******n
发帖数: 156 | 12 that's right. But I think CP is not guard period. Guard Period is to leave
the cyclic prefix part bland. Moreover,
CP can also prevent ICI (The ICI caused by truncation in time period. The
orthogonal property in frequency
requires infinity in time domain)
I forget two questions. See the following questions my answer is right or
not.
Q: CP can prevent the interference of previous signal. Does CP itself bring
interference to the current signal?
A: No, from derivation, at receiver, the current sign
【在 f*********t 的大作中提到】
: Thanks a lot for sharing those questions, Those answers are really good.
: Maybe there are a little more to say for the cyclic prefix.
: According to the answer leave the cyclic prefix part to be bland, ISI can
: also be avoided. In real multipath environment, we cannot leave the cyclic
: prefix to be blank.
: I don't think this is the reason that they didn't give you onsite. Qualcomm
: is very BT. I just want to dicuss if there are any better answers for those
: questions.
|
f*********t
发帖数: 37 | 13
Yeah, I agree with you at this point. From your original post, it sounds
like that you explain CP as a guard period.
(The ICI caused by truncation in time period. The
Why do you think orthogonal property requires infinity in time domain?
bring
is
I think your answer is correct to me, but maybe the interviewer want to
listen something about circular convolution :) or you use circular
convolution to explain will be clearer to them.
【在 p******n 的大作中提到】
: that's right. But I think CP is not guard period. Guard Period is to leave
: the cyclic prefix part bland. Moreover,
: CP can also prevent ICI (The ICI caused by truncation in time period. The
: orthogonal property in frequency
: requires infinity in time domain)
: I forget two questions. See the following questions my answer is right or
: not.
: Q: CP can prevent the interference of previous signal. Does CP itself bring
: interference to the current signal?
: A: No, from derivation, at receiver, the current sign
|
p******n
发帖数: 156 | 14 How to explain it using circular convolution?
Thanks!
【在 f*********t 的大作中提到】
:
: Yeah, I agree with you at this point. From your original post, it sounds
: like that you explain CP as a guard period.
: (The ICI caused by truncation in time period. The
: Why do you think orthogonal property requires infinity in time domain?
: bring
: is
: I think your answer is correct to me, but maybe the interviewer want to
: listen something about circular convolution :) or you use circular
: convolution to explain will be clearer to them.
|
t**********t
发帖数: 12071 | 15 我觉得LZ据的主要原因恐怕是因为他们就没打算招人。 |
f*********t
发帖数: 37 | 16 You already answered it in other question. The multipath effects on a symbol
with CP is just like a circular convolution. That's the reason you say it
will be a multiplication on frequency domain, isn't it?
I still dont know why you think orthogonal property requires infinity in time domain?
Is there any reason?
"Q: just now. You said that convolution in time domain is corresponding to
multiplication in frequency
domain. This is for continuous time. How about the property for discrete
time signa
【在 p******n 的大作中提到】
: How to explain it using circular convolution?
: Thanks!
|
g****t
发帖数: 31659 | 17 他可能看你是fresh master,没有项目经验，所以问的都是基础问题。
如果有经验的，那多半会问很多具体作的项目相关的东西。
如果有研究的，那有时候会问点研究相关的。
但他连你的研究都没问，纯知识，有点奇怪。
这都有点像国内考博士了，完全不像工业界招人。
可能其他的candidate里头有不少有工作经验的，所以你被淘汰了。
你的答案应该没啥问题。
也有可能老印就不招老中。
原因
【在 p******n 的大作中提到】
: Qualcomm 失败面经,虽然失败了,还是帖出来于大家共享之,另外也求大家帮我分析下原因
: 周一电面了qualcomm,面完还挺高兴的,因为自我感觉良好,只有一个问题没答上来.虽然
: 有点遗憾,因为这个问题还挺基
: 本的.但还是很自信可以有下文的.没想到两天后就收到了据信.
: 以下是面试全过程.希望大家帮我分析下失败原因.
: 印度人面的我.句子听不太懂.但是关键词绝对没错,因为都是自己本专业的,所以很敏感
: 而且我还重复了一下他的问题,他
: 都答没错.
: Position: System engineer - PHY-MAC layer, all levels needed
: My degree: Master of Electrical Engineering.
|
l******n
发帖数: 97 | 18 the thing that prevents ISI (i.e. robust to multi-path) is guard interval.
guard interval can be anything, typically CP or ZP (zero-padding, or as you
said blank). what makes CP useful is because it makes the reconstruction
easier, thanks to the linear conv -> circular conv property. It would be my
answer, more discussion please, hehe
Qualcomm
those
【在 f*********t 的大作中提到】
: Thanks a lot for sharing those questions, Those answers are really good.
: Maybe there are a little more to say for the cyclic prefix.
: According to the answer leave the cyclic prefix part to be bland, ISI can
: also be avoided. In real multipath environment, we cannot leave the cyclic
: prefix to be blank.
: I don't think this is the reason that they didn't give you onsite. Qualcomm
: is very BT. I just want to dicuss if there are any better answers for those
: questions.
|
e*******n
发帖数: 323 | 19 我这儿也有一印度哥们儿
也刚从那儿in-site回来，
正春风得意着呢
【在 g****t 的大作中提到】
: 他可能看你是fresh master,没有项目经验，所以问的都是基础问题。
: 如果有经验的，那多半会问很多具体作的项目相关的东西。
: 如果有研究的，那有时候会问点研究相关的。
: 但他连你的研究都没问，纯知识，有点奇怪。
: 这都有点像国内考博士了，完全不像工业界招人。
: 可能其他的candidate里头有不少有工作经验的，所以你被淘汰了。
: 你的答案应该没啥问题。
: 也有可能老印就不招老中。
:
: 原因
|
g****t
发帖数: 31659 | 20 好像一般onsite好像就是看个印象，能不能和同组的人合得来。
没大问题，多半就会要了。
【在 e*******n 的大作中提到】
: 我这儿也有一印度哥们儿
: 也刚从那儿in-site回来，
: 正春风得意着呢
|
|
|
p******n
发帖数: 156 | 21 My main research is on MIMO and CDMA. There is just one sentence about OFDM
in my resume.
But he didn't ask anything about MIMO or CDMA.
【在 g****t 的大作中提到】
: 他可能看你是fresh master,没有项目经验，所以问的都是基础问题。
: 如果有经验的，那多半会问很多具体作的项目相关的东西。
: 如果有研究的，那有时候会问点研究相关的。
: 但他连你的研究都没问，纯知识，有点奇怪。
: 这都有点像国内考博士了，完全不像工业界招人。
: 可能其他的candidate里头有不少有工作经验的，所以你被淘汰了。
: 你的答案应该没啥问题。
: 也有可能老印就不招老中。
:
: 原因
|
s********k
发帖数: 6180 | 22 关键问题是面试你的人肯定不是从你的简历出发问，而是他们的需求出发。CDMA显然
QCOM已经不敢兴趣了。不过没有问你MIMO有点奇怪。
OFDM
【在 p******n 的大作中提到】
: My main research is on MIMO and CDMA. There is just one sentence about OFDM
: in my resume.
: But he didn't ask anything about MIMO or CDMA.
|
g****t
发帖数: 31659 | 23 你没把自己的research写到resume? 他没问你研究生期间干了啥？
wierd wierd...
OFDM
【在 p******n 的大作中提到】
: My main research is on MIMO and CDMA. There is just one sentence about OFDM
: in my resume.
: But he didn't ask anything about MIMO or CDMA.
|
g****t
发帖数: 31659 | 24 面试一般应该都会问问来美国这段时间干的啥的
那是最接近的经历
我没见过或者听说过不问这些，上来就是一堆研究生考题的。
【在 s********k 的大作中提到】
: 关键问题是面试你的人肯定不是从你的简历出发问，而是他们的需求出发。CDMA显然
: QCOM已经不敢兴趣了。不过没有问你MIMO有点奇怪。
:
: OFDM
|
p******n
发帖数: 156 | 25 写了,我整个rusume几乎都是关于mimo的,ofdm就一句话
【在 g****t 的大作中提到】
: 你没把自己的research写到resume? 他没问你研究生期间干了啥？
: wierd wierd...
:
: OFDM
|
n*****o
发帖数: 58 | 26 问题倒是都不难，lz回答得也都很不错，如果你英文没问题的话，感觉不是出在你回答
上，可能是竞争太激烈了，或者他们就早就订好了candidate了，你research
experience没有其他人更有竞争力 |
l*******1
发帖数: 866 | 27 usually not true, including Qualcomm (at least for those groups I know).
It usually is fairly technical (if not very technical) for an engineering
position.
As for qualcomm groups in particular, they normally tend to bring quite
some candidates to onsite interviews (qualcomm is rich). So to get an
offer,one has to be both technically strong and easy to work with.
【在 g****t 的大作中提到】
: 好像一般onsite好像就是看个印象，能不能和同组的人合得来。
: 没大问题，多半就会要了。
|
l*******1
发帖数: 866 | 28 Your answers are OK. It's hard to tell why you are rejected. There could be
better candidates; or for some reason the interviewer didn't like you or
some of you answers; or they are more interested in PhD (I know quite some
qualcomm System Engineers and most of them are PhDs); or the interviewer
likes indians more......who knows
No need to guess, just learn from the dicussion here and move on. Job
hunting is always like this.
By the way, you probably can try firmware engineer positions or someth
【在 p******n 的大作中提到】
: Qualcomm 失败面经,虽然失败了,还是帖出来于大家共享之,另外也求大家帮我分析下原因
: 周一电面了qualcomm,面完还挺高兴的,因为自我感觉良好,只有一个问题没答上来.虽然
: 有点遗憾,因为这个问题还挺基
: 本的.但还是很自信可以有下文的.没想到两天后就收到了据信.
: 以下是面试全过程.希望大家帮我分析下失败原因.
: 印度人面的我.句子听不太懂.但是关键词绝对没错,因为都是自己本专业的,所以很敏感
: 而且我还重复了一下他的问题,他
: 都答没错.
: Position: System engineer - PHY-MAC layer, all levels needed
: My degree: Master of Electrical Engineering.
|
i******s
发帖数: 911 | 29 都是基本问题啊，虽然我是学电路设计的，也能看懂他在问什么
【在 k*******d 的大作中提到】
: 感谢楼主share 面经，我觉得楼主的回答都挺不错的啊
|
b*******t
发帖数: 164 | 30 Q: just now. You said that convolution in time domain is corresponding to
multiplication in frequency
domain. This is for continuous time. How about the property for discrete
time signal?
A: the circled convolution in time domain is related to multiplication in
frequency domain.
The question is not correct. linear convolution is for continuous frequency
(continuous time aperiodic signal and discrete time signal), circular
convolution is for discrete time and discrete frequency.
原因
【在 p******n 的大作中提到】
: Qualcomm 失败面经,虽然失败了,还是帖出来于大家共享之,另外也求大家帮我分析下原因
: 周一电面了qualcomm,面完还挺高兴的,因为自我感觉良好,只有一个问题没答上来.虽然
: 有点遗憾,因为这个问题还挺基
: 本的.但还是很自信可以有下文的.没想到两天后就收到了据信.
: 以下是面试全过程.希望大家帮我分析下失败原因.
: 印度人面的我.句子听不太懂.但是关键词绝对没错,因为都是自己本专业的,所以很敏感
: 而且我还重复了一下他的问题,他
: 都答没错.
: Position: System engineer - PHY-MAC layer, all levels needed
: My degree: Master of Electrical Engineering.
|
|
|
S*******w
发帖数: 24236 | 31 这些东西学过就忘了。。。
【在 i******s 的大作中提到】
: 都是基本问题啊，虽然我是学电路设计的，也能看懂他在问什么
|
k***d
发帖数: 536 | 32 without the core patent claim around OFDM, QCOM stock could fall to 0, it is
the underlying technology for both WiMax and LTE. What I meant is less
technical more behavioral.
Here is what I will do if the thing could start over: before the QCOM
interview I will try to read as much as I can on OFDM, and during the
interview I will tell the interviewer: look, even though my research does
not cover OFDM in school, I think it is the key technology for future
communication, and I read about it whenev
【在 p******n 的大作中提到】
: 能否说得详细点,我的确对ofdm了解的不多.因为我一直都是在作mimo方向的研究.ofdm
: 是本科毕设的事情了
:
: OFDM
|
j******g
发帖数: 1098 | 33 怎么问的问题这么怪。
感觉就是在考试一样
偶也电面过qualcomm的2个组，
还是问实际的问题多一点啊。
这边有去qualcomm onsite过的吗？能否说说注意事项？
小弟过两天就要去onsite了 |
t**t
发帖数: 322 | 34 对的，估计主要是qualcomm基本上hiring freeze了
不要疑神疑鬼的，你回答的不错。
可能是你只有master，以前又没有做过qualcomm的intern。
现在估计做过intern的，都未必能变成full time的了。
如果早两年面试，应该没有问题了。现在经济不好啊
【在 t**********t 的大作中提到】
: 我觉得LZ据的主要原因恐怕是因为他们就没打算招人。
|
l*******1
发帖数: 866 | 35 Just FYI.....Qualcomm的hiring freeze已经over至少两个多月了。有些
组正"hiring aggressively".
【在 t**t 的大作中提到】
: 对的，估计主要是qualcomm基本上hiring freeze了
: 不要疑神疑鬼的，你回答的不错。
: 可能是你只有master，以前又没有做过qualcomm的intern。
: 现在估计做过intern的，都未必能变成full time的了。
: 如果早两年面试，应该没有问题了。现在经济不好啊
|
j******g
发帖数: 1098 | 36 qualcomm现在是在招人
有的组还是multiple opening
偶上两天电面的那个组，manager就跟我说有multiple opening
【在 l*******1 的大作中提到】
: Just FYI.....Qualcomm的hiring freeze已经over至少两个多月了。有些
: 组正"hiring aggressively".
|
f*********t
发帖数: 37 | 37 Who can forward resume for me ya ?
【在 j******g 的大作中提到】
: qualcomm现在是在招人
: 有的组还是multiple opening
: 偶上两天电面的那个组，manager就跟我说有multiple opening
|
j******g
发帖数: 1098 | 38 直接他家网页网申吧
【在 f*********t 的大作中提到】
: Who can forward resume for me ya ?
|
M*******c
发帖数: 4371 | 39 Normal.
Qualcomm HR would not recruit you even if there is only one SOSO feedback.
原因
【在 p******n 的大作中提到】
: Qualcomm 失败面经,虽然失败了,还是帖出来于大家共享之,另外也求大家帮我分析下原因
: 周一电面了qualcomm,面完还挺高兴的,因为自我感觉良好,只有一个问题没答上来.虽然
: 有点遗憾,因为这个问题还挺基
: 本的.但还是很自信可以有下文的.没想到两天后就收到了据信.
: 以下是面试全过程.希望大家帮我分析下失败原因.
: 印度人面的我.句子听不太懂.但是关键词绝对没错,因为都是自己本专业的,所以很敏感
: 而且我还重复了一下他的问题,他
: 都答没错.
: Position: System engineer - PHY-MAC layer, all levels needed
: My degree: Master of Electrical Engineering.
|
j******g
发帖数: 1098 | 40 决定招人的是HR？开什么玩笑啊
【在 M*******c 的大作中提到】
: Normal.
: Qualcomm HR would not recruit you even if there is only one SOSO feedback.
:
: 原因
|
|
|
M*******c
发帖数: 4371 | 41 Hr has the right to veto in Qualcomm.
Besides in Qualcomm, HM is not the only that could make the decision.
【在 j******g 的大作中提到】
: 决定招人的是HR？开什么玩笑啊
|
j******g
发帖数: 1098 | 42 能展开说说吗？
我只是听说VP最后有权决定是否批这个opening
【在 M*******c 的大作中提到】
: Hr has the right to veto in Qualcomm.
: Besides in Qualcomm, HM is not the only that could make the decision.
|
