3G反向链路HPSK调制技术研究

Research of HPSK modulation scheme for third generation reverse links

在移动通信中,手机功率放大器是典型的非线性放大器,为抑制带外功率辐射,要求调制信号的峰均比尽可能小。HPSK调制方案是一个应用于WCDMA和cdma2000反向链路中的调制技术,能有效地降低峰均比,提高功率放大器的效率和降低带外辐射功率。分析了复扰码的应用目的、工作原理和HPSK调制方法的原理,给出了复扰码器的数学表达式,证明了HPSK信号π相位跳变的概率值,分析其HPSK信号的峰均比。

In mobile communications, the high power amplifier （HPA） of mobile handset is a typical non linear amplifier. In order to reduce out-of-band power regret, peak-to-average power ratio （PAR） must be as small as possible . Hybrid PSK （HPSK） modulation scheme is proposed as the uplink modulating technique for WCDMA and ed ma2000, This scheme can effectively reduce PAR , increase efficiency of the HPA and reduce out-of-band power. After analysis of the application aim and working principle of complex scrambling and the principle of HPSK modulation method, the mathematical expression for complex scrambling is presented, and the πphase transition probability and PAR of the HPSK are analyzed.