Performance Analysis of Coded Modulation Signal Based on Software-Defned Radio
Received date: 2016-07-07
Revised date: 2016-10-17
Online published: 2017-05-30
To evaluate the performance of coded and modulated signals in a wireless channel, experiments are performed based on the universal software radio peripheral (USRP). Performances of coding and modulation schemes using 8 phase-shift keying and three channel coding schemes, including turbo codes, binary low density parity check (LDPC) codes and non-binary LDPC codes, are compared and analyzed. To ensure accuracy of the apriori probability, phase ambiguity in the symbol of 8 phase-shift keying is detected and recovered based on frame synchronization sequences. An empirical characteristic function is used to estimate the channel noise variance. Furthermore, a priori probability is calculated from the recovered symbol and the estimated noise variance. Simulation and experimental results show that, with short code length, superior performance can be achieved with the three channel coding schemes, and non-binary LDPC codes performs better than binary LDPC codes and Turbo codes.
ZOU Jie, CHEN Wei-gang, YANG Jin-sheng . Performance Analysis of Coded Modulation Signal Based on Software-Defned Radio[J]. Journal of Applied Sciences, 2017 , 35(3) : 275 -287 . DOI: 10.3969/j.issn.0255-8297.2017.03.001
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