Multi-code Biorthogonal Code Keying with Constant Amplitude Coding Combined with Q²PSK to Increase Bandwidth Efficiency 


Vol. 31,  No. 5, pp. 484-492, May  2006


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  Abstract

A multi-code biorthogonal code keying(MBCK) system consists of multiple waveform coding block, and the sum of output codewords is transmitted. Drawback of MBCK is it requires amplifier with high linearity because its output symbol is multi-level. MBCK with constant amplitude precoding blcok(CA-MBCK) has been proposed, which guarantees sum of orthogonal codes to have constant amplitude. Redundant bits of CA-MBCK for constant amplitude coding are not only used to make constant amplitude signal but also used to improve the bit error rate(BER) performance at receiver. In this paper, we proposed a transmission scheme which combine CA-MBCK with Q²PSK to improve bandwidth efficiency of CA-MBCK. The BER performance of the scheme is same that of CA-MBCK in additive white gaussian noise(AWGN). And we showed that BER performance of the proposed system can be improved using redundant bits of constant amplitude precoding.

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  Cite this article

[IEEE Style]

S. P. Kim and M. J. Kim, "Multi-code Biorthogonal Code Keying with Constant Amplitude Coding Combined with Q²PSK to Increase Bandwidth Efficiency," The Journal of Korean Institute of Communications and Information Sciences, vol. 31, no. 5, pp. 484-492, 2006. DOI: .

[ACM Style]

Sung Pil Kim and Myoung Jin Kim. 2006. Multi-code Biorthogonal Code Keying with Constant Amplitude Coding Combined with Q²PSK to Increase Bandwidth Efficiency. The Journal of Korean Institute of Communications and Information Sciences, 31, 5, (2006), 484-492. DOI: .

[KICS Style]

Sung Pil Kim and Myoung Jin Kim, "Multi-code Biorthogonal Code Keying with Constant Amplitude Coding Combined with Q²PSK to Increase Bandwidth Efficiency," The Journal of Korean Institute of Communications and Information Sciences, vol. 31, no. 5, pp. 484-492, 5. 2006.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880