AN IMPLEMENTATION OF A CMA ADAPTIVE ARRAY FOR HIGH-SPEED GMSK TRANSMISSION IN MOBILE COMMUNICATIONS

被引：62

作者：

OHGANE, T ^{[1
]}

SHIMURA, T ^{[1
]}

MATSUZAWA, N ^{[1
]}

SASAOKA, H ^{[1
]}

机构：

[1] HITACHI LTD,CENT RES LAB,KOKUBUNJI,TOKYO 185,JAPAN

来源：

IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY | 1993年 / 42卷 / 03期

关键词：

D O I：

10.1109/25.231879

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：

The hardware implementation of an adaptive array as a technique for compensating multipath fading in mobile communications is described. The number of the antenna elements is four. The target communication system is modulated by 256 kbps Gaussian-filtered minimum shift keying and has a time-division multiplexing architecture with 24 time slots. Based on the digital beam forming concept, all of the signals and the array weights are digital-signal processed. The constant modulus algorithm (CMA) is employed for weight optimizing. In an additive white Gaussian noise channel, this system has 5.6 dB gain in an energy-per-bit-to-noise-density ratio (E(b)/N0), at a bit error rate (BER) of 1.0 x 10(-3), compared with a single-antenna system. The result of the basic field test shows that the gain at a BER of 1.0 x 10(-3) reaches 22.3 dB in a nonselective, slow Rayleigh fading channel given a 5 Hz maximum Doppler shift. These results certify our successful implementation.

引用

页码：282 / 288

页数：7

共 18 条

[11]

OHGANE T, 1991, 1991 P C VEH TECHHN, P172

[12]

Proakis J. G., 1983, DIGITAL COMMUNICATIO

[13] ADAPTIVE EQUALIZATION [J].