### Jithin RJ (@jithinrj)

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

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

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...

## Re: What is the significance of whitening "signal + noise" at the receiver side in a wireless communication 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

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

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

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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