Oct 7th, 200910 Comments
The post on IQ imbalance in transmitter, briefly discussed the effect of amplitude and phase imbalance and also showed that IQ imbalance results in spectrum at the image frequency. In this article, we will quantify [...]
Sep 30th, 20121 Comment
Aug 28th, 2012No Comments
Jul 9th, 20129 Comments
Jun 22nd, 20123 Comments
In May 2008, we derived the theoretical symbol error rate for a general M-QAM modulation (in Embedded.com, DSPDesignLine.com and dsplog.com) under Additive White Gaussian Noise. While re-reading that post, felt that the article is nice and warrants a [...]
Jul 20th, 20105 Comments
Apr 12th, 20109 Comments
Jul 5th, 200934 Comments
Jun 16th, 200947 Comments
In the past, we had discussed BER for BPSK in flat fading Rayleigh channel and BER for BPSK in a frequency selective channel using Zero Forcing Equalization. In this post, lets discuss a frequency selective [...]
Jan 22nd, 200949 Comments
Sep 11th, 2012No Comments
Apr 4th, 20122 Comments
Oct 22nd, 20119 Comments
Sep 30th, 20121 Comment
Dec 25th, 20111 Comment
Dec 4th, 201110 Comments
An earlier post we discussed hard decision decoding for a Hamming (7,4) code and simulated the the bit error rate. In this post, let us focus on the soft decision decoding for the Hamming (7,4) [...]
Aug 21st, 200923 Comments
Question 28 on electromagnetics from GATE (Graduate Aptitude Test in Engineering) 2012 Electronics and Communication Engineering paper. Q28. A transmission line with a characteristic impedance of 100 is used to match a 50 section to a 200 section. If the matching [...]
Jan 23rd, 2013No Comments
Dec 29th, 2012No Comments