Title :
Performance of interleaved serial concatenated convolutional codes with DSS/DPSK multicarrier modulation in a Doppler spread channel
Author :
Petzold, Mark C. ; Ziemer, Rodger E.
Author_Institution :
Dept. of Electr. Eng., Colorado Univ., Colorado Springs, CO, USA
Abstract :
We study a direct sequence spread spectrum DPSK multicarrier system combined with the interleaved serial concatenated convolutional codes. This combination of error correction coding and modulation is both powerful and flexible. In this paper, we study the effects of increasing the data rate by transmitting information bits in parallel on the multicarrier channel in a Doppler spread environment. Overall bandwidth is kept constant by decreasing the number of chips per channel symbol as the number of carriers increases. Each subchannel of the multicarrier channel is assumed to be frequency non-selective but fade independently of the others subchannels. Results are shown for several fading cases. In addition, it is noted that the performance gained by iterating more than 4 times is not significant
Keywords :
Doppler effect; code division multiple access; concatenated codes; convolutional codes; differential phase shift keying; error correction codes; fading channels; land mobile radio; modulation coding; multiuser channels; radio receivers; spread spectrum communication; DS-CDMA; DSS/DPSK multicarrier modulation; Doppler spread channel; Doppler spread environment; bandwidth; data rate; direct sequence spread spectrum; error correction coding; fast fading; frequency nonselective channel; information bits transmission; interleaved serial concatenated convolutional codes; mobile communications; multicarrier channel; parallel transmission; performance; Bandwidth; Concatenated codes; Convolutional codes; Decision support systems; Delay; Differential quadrature phase shift keying; Error correction codes; Modulation coding; Springs; Turbo codes;
Conference_Titel :
Vehicular Technology Conference, 1999 IEEE 49th
Conference_Location :
Houston, TX
Print_ISBN :
0-7803-5565-2
DOI :
10.1109/VETEC.1999.778022