A NOVEL ITERATIVE DECISION-DIRECTED DIFFERENTIAL DETECTION TECHNIQUE FOR DIFFERENTIAL OFDM SYSTEMS

被引：0

作者：

Zhang, Liang ^{[1
]}

Thibault, Louis ^{[1
]}

Hong, Zhihong ^{[1
]}

机构：

[1] Commun Res Ctr Canada, Ottawa, ON, Canada

来源：

GLOBECOM 2009 - 2009 IEEE GLOBAL TELECOMMUNICATIONS CONFERENCE, VOLS 1-8 | 2009年

关键词：

OFDM; Decision feedback; differential detection; pi/4-DQPSK; fast fading; channel estimation; RAYLEIGH FADING CHANNELS;

D O I：

暂无

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：

We propose a novel Iterative Decision-Directed Differential Detection (iD(4)) technique for Orthogonal Frequency Division Multiplexing (OFDM) systems employing Differential Phase Shift Keying (DPSK) modulation in each subcarrier, such as the Eureka 147 Digital Audio/Multimedia Broadcasting (DAB/DMB) system. The iD(4) technique improves the differential detection performance in fast fading channels by estimating and compensating the time-domain Channel Phase Variation (CPV). Computer simulations show that significant performance improvement is achieved by using iD(4) over Conventional Differential Detection (CDD), and the maximum Doppler spread, at which the OFDM receiver can achieve satisfactory reception, is greatly extended. Taking the DAB/OMB system operating in mode IV at L-band as an example, iD(4) increases the maximum receiver vehicle speed from 95 kilometers per hour (km/h) to 190 km/h, in a Typical Urban (TU) channel environment.

引用

页码：1313 / 1318

页数：6

共 8 条

[1]

*COMM EUR COMM, 1989, 12160 EUR COMM EUR C

[2] MULTIPLE-SYMBOL DIFFERENTIAL DETECTION OF MPSK [J].