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Least Squares in Gaussian Noise – Maximum Likelihood

by Krishna Sankar on January 15, 2012

From the previous posts on Linear Regression (using Batch Gradient descent, Stochastic Gradient Descent, Closed form solution), we discussed couple of different ways to estimate the  parameter vector in the least square error sense for [...]

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Six equalizers for V-BLAST

by Krishna Sankar on April 21, 2009

ber_plot_2transmit_2receive_mimo_with_bpsk_in_rayleigh_channel

In the past, we had discussed several posts on two transmit two receive MIMO communication, where the transmission was based on V-BLAST. The details about V-BLAST can be read from the landmark paper V-BLAST: An [...]

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Soft Input Viterbi decoder

by Krishna Sankar on January 14, 2009

BER plot for BPSK with AWGN in soft decision Viterbi decoding

In two previous posts, we have discussed Convolutional Coding and the associated hard decision Viterbi decoding. In this post lets extent Viterbi decoding algorithm to soft input decision scheme. The modulation used is BPSK and [...]

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MIMO with ML equalization

by Krishna Sankar on December 14, 2008

BER plot 2x2 MIMO Rayleigh channel with Maximum Likelihood equalisation

We have discussed quite a few receiver structures for a 2×2 MIMO channel namely, (a) Zero Forcing (ZF) equalization (b) Minimum Mean Square Error (MMSE) equalization (c) Zero Forcing equalization with Successive Interference Cancellation (ZF-SIC) [...]

D id you like this article? Make sure that you do not miss a new article by subscribing to RSS feed OR subscribing to e-mail newsletter. Note: Subscribing via e-mail entitles you to download the free e-Book on BER of BPSK/QPSK/16QAM/16PSK in AWGN.