Myself, Jithin, works at Tektronix as DSP Algo engineer for wireless measurements product line. I hold a Master's degree from IIT Madras, following which I have worked for more than 2 years at Broadcom in the areas of Phy Layer of IC design. I am keen follower of this website, and I am always interested in pursuing new avenues in signal processing for wireless communications.

Re: Aliasing effect in RRC filter

Reply posted 3 years ago (06/06/2017)
When you do transmit filter, you must have already upsampled by 2 as you mentioned. When you downsample at receiver, there won't be aliasing hence. 

Re: MIMO naming convention

Reply posted 4 years ago (02/16/2017)
When you say system, it includes both UE and Base station. I feel it is wrong to isolate one of them and call it a system. One of the main aspect of this system...
From what I know, the received signal in wireless system is y=hx + n. where n is complex gaussian white noise. After applying equalization, y* = y/h = x + n/h....

Re: LTI system

Reply posted 4 years ago (11/02/2016)
I think there are 2 ways to check if a system is LTI. First it has to be linear. There are 2 conditions for that -a) For 0 input, the output should be 0. b) If the...

Re: LTE - concept of layer mapping

Reply posted 4 years ago (10/24/2016)
There 3 Tx antennas, 2 Rx antennas. $$y = Hx+n $$. $$ \hat{x} = H^{-1}y $$ is how you equalize for H and decode x. As you can see, you have to apply pseudo inverse...

Re: LTE - concept of layer mapping

Reply posted 4 years ago (10/24/2016)
1) No. If you are familiar with MIMO concepts like Spatial Multiplexing(SM), then layer refers to the number of layers in SM. For example in 2x2 MIMO system (2 antenna...

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