A novel M-ary modulation technique based on optimal chirp signal design

作者：Meng Fanyu^*; Gu Xuemai; Guo Qing

来源：High Technology Letters, 2012, 18(4): 357-363.

DOI：10.3772/j.issn.1006-6748.2012.04.004

• Additive white Gaussian noise channel
• CHIRP signals
• Chirp spread spectrum
• Cross correlations
• Data rates
• Linear chirp signals
• M-ary modulation
• Modulation techniques
• Optimal scheme
• Orthogonal chirps
• Wireless channel

A novel M-ary chirp modulation technique based on an optimal chirp signal design is proposed in this paper to offer higher data rate for an indoor wireless chirp spread spectrum communication system. Both linear chirp signals and combined chirp signals are used in this system to reduce the effect of the cross correlation, and simplify the complexity of the system. The optimal scheme of designing both linear chirp signals and combined chirp signals is discussed to minimize the value of the cross correlation and obtain a better system performance. Simulation results show that, compared with the binary orthogonal chirp modulation technique, the M-ary chirp modulation technique based on an optimal chirp signal set has a higher data rate with a reasonable bit-error rate (BER) performance under both additive white gaussian noise (AWGN) channel and indoor wireless channel.

• 出版日期2012