Title :
Adjacent channel interference susceptibility of serial concatenated continuous phase modulation
Author :
Kons, S. ; Kalet, I.
Author_Institution :
Dept. of Electr. Eng., Technion-Israel Inst. of Technol., Haifa, Israel
Abstract :
Iterative decoding of a serially concatenated outer convolutional code and an inner continuous phase modulation (CPM) separated by a random interleaver is examined. This scheme, which is known to produce a high coding gain, is examined for various CPMs such as MSK, LRC, GMSK and TFM. CPM signals are constant envelope signals with very high bandwidth efficiency, providing good immunity to adjacent channel interference (ACI). The susceptibility of the serial concatenated system to ACI is examined. Simulations show that this configuration can tolerate much stronger ACI than previous CPM schemes, including those detected with the Viterbi algorithm
Keywords :
adjacent channel interference; concatenated codes; continuous phase modulation; convolutional codes; frequency modulation; interleaved codes; iterative decoding; minimum shift keying; turbo codes; ACI immunity; AWGN; CPM signals; GMSK; LRC; MSK; TFM; Viterbi algorithm; additive white Gaussian noise; adjacent channel interference susceptibility; constant envelope signals; high bandwidth efficiency; high coding gain; iterative decoding; memoryless channel; outer convolutional code; random interleaver; serial concatenated CPM; serial concatenated continuous phase modulation; simulations; turbo codes; AWGN; Bandwidth; Concatenated codes; Continuous phase modulation; Convolutional codes; Interchannel interference; Iterative decoding; Performance analysis; Signal analysis; Viterbi algorithm;
Conference_Titel :
Communications, 2001. ICC 2001. IEEE International Conference on
Conference_Location :
Helsinki
Print_ISBN :
0-7803-7097-1
DOI :
10.1109/ICC.2001.936318
