Wireless/SDR Archives - Page 16 of 16

July 9, 2016 DSP / Wireless/SDR

Digital Filter and Square Timing Recovery

We have seen before how a symbol timing offset severely impacts the constellation of the received symbols. Therefore, symbol timing

July 8, 2016 DSP / Wireless/SDR

Convoluted Correlation between Matched Filter and Correlator

Now we turn out attention towards a topic that causes a lot of confusion for communications and DSP learners: what

$Spectral efficiency R_b/B versus E_b/N_0 determines the overall merit of a modulation scheme. This figure is drawn for BER = 10^{-5} and a Square-Root Raised Cosine pulse with 50% excess bandwidth$

June 1, 2016 Wireless/SDR

Computing Error Rates

Having built a simple digital communication system, it is necessary to know how to measure its performance. As the names

Minimum distance rule based detector decisions in a QPSK constellation in the presence of a carrier frequency offset

June 6, 2016 DSP / Wireless/SDR

How a Frequency Locked Loop (FLL) Works

We saw before how a carrier frequency offset distorts the received signal. Later, we also described the classification of frequency