Title :
Maximum Free Distance Rate 1/2 Spectral Line Free Convolutional Codes for BPSK/Q-BOPPM TH-IR UWB Systems
Author :
Villarreal-Reyes, S. ; Edwards, R.M. ; Villasenor-Gonzalez, L. ; Conte-Galvan, R. ; Aquino-Santos, R.
Author_Institution :
Electron. & Telecommun. Dept., CICESE Res. Center, Ensenada, Mexico
fDate :
3/1/2011 12:00:00 AM
Abstract :
The topic of spectral shaping is of major interest in the design of time hopping (TH) impulse radio (IR) ultra wideband (UWB) communications systems. In this letter novel rate 1/2 “spectral line free” convolutional codes for binary phase shift keying (BPSK) and quaternary biorthogonal pulse position modulated (Q-BOPPM) TH-IR UWB systems are introduced. When using these codes in BPSK/Q-BOPPM TH-IR UWB systems, the power spectral density of the signal shows no spectral lines, even when the encoder input consists of a non-uniform distributed binary data stream. The reported codes have maximum free-distance and thus offer significant forward error correction capabilities.
Keywords :
convolutional codes; forward error correction; orthogonal codes; phase shift keying; pulse position modulation; ultra wideband communication; BPSK-Q-BOPPM TH-IR UWB systems; binary phase shift keying; forward error correction; impulse radio; maximum free distance rate; nonuniform distributed binary data stream; power spectral density; quaternary biorthogonal pulse position modulated systems; spectral line free convolutional codes; time hopping communications systems; ultrawideband communications systems; Binary phase shift keying; Bit error rate; Convolutional codes; Distributed databases; Feedforward neural networks; Polynomials; Convolutional codes; power spectral density (PSD); time hopping impulse radio (TH-IR); ultra-wideband (UWB);
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2010.2103398
