A FULLY DIGITAL FEEDFORWARD MSK DEMODULATOR WITH JOINT FREQUENCY OFFSET AND SYMBOL TIMING ESTIMATION FOR BURST MODE MOBILE RADIO

被引：57

作者：

MEHLAN, R ^{[1
]}

CHEN, YE ^{[1
]}

MEYR, H ^{[1
]}

机构：

[1] RHEIN WESTFAL TH AACHEN, INST INTEGRATED SYST SIGNAL PROC, AACHEN, GERMANY

来源：

IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY | 1993年 / 42卷 / 04期

关键词：

D O I：

10.1109/25.260769

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A strictly feedfonvard demodulator structure for minimum shift keying (MSK) modulation with joint nondata-aided symbol clock and frequency offset estimation is presented. Due to its feedforward operation, clock synchronization and frequency offset compensation are hang-up free, and the demodulator is well suited for a digital implementation. The sampled baseband signal is passed through a nonlinearity and smoothed by a digital filter. The magnitude of the filter output directly drives the clock recovery process. The phase of the smoothed signal is an estimate of the carrier frequency offset and is used for offset compensation. Following synchronization, the signal is demodulated differentially coherent. The performance of the demodulator is assessed for the AWGN and the Rayleigh flat and frequency-selective fading channel by computer simulations.

引用

页码：434 / 443

页数：10

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