Journal ArticleDOI
Combined effects of phase sweeping transmitter diversity and channel coding
TLDR
A novel transmitter diversity scheme that generates forced fading to improve the performance of channel coding is proposed and investigated and it is shown that excessively long interleaving is not required by the use of transmitter diversity.Abstract:
A novel transmitter diversity scheme that generates forced fading to improve the performance of channel coding is proposed and investigated. Since the required phase sweeping frequency is much smaller than the transmission bit rate, bandwidth expansion is negligible. A sinusoidal phase sweeping function Delta Theta sin(2 pi f/sub H/t) is employed in laboratory experiments using 32 kbit/s quarternary differential phase shift keying (QDPSK) with differential detection and BCH(23,12) code. It is shown that Delta Theta =200 degrees and f/sub H/=67 Hz can be used when m (interleaving depth)=10 b. Hence, excessively long interleaving is not required by the use of transmitter diversity. Under very slow Rayleigh fading (f/sub D/=1 Hz), a measured improvement of 4.8 dB is obtained at a word error rate of 10/sup -2/ without receiver diversity. Applications include paging systems that require very simple receivers. >read more
Citations
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Journal ArticleDOI
Space-time codes for high data rate wireless communication: performance criterion and code construction
TL;DR: In this paper, the authors consider the design of channel codes for improving the data rate and/or the reliability of communications over fading channels using multiple transmit antennas and derive performance criteria for designing such codes under the assumption that the fading is slow and frequency nonselective.
Journal ArticleDOI
Opportunistic beamforming using dumb antennas
TL;DR: This work shows that true beamforming gains can be achieved when there are sufficient users, even though very limited channel feedback is needed, and proposes the use of multiple transmit antennas to induce large and fast channel fluctuations so that multiuser diversity can still be exploited.
Journal ArticleDOI
Fading channels: information-theoretic and communications aspects
TL;DR: This paper describes the statistical models of fading channels which are frequently used in the analysis and design of communication systems, and focuses on the information theory of fading channel, by emphasizing capacity as the most important performance measure.
Book
Space-time block coding for wireless communications: performance results
TL;DR: It is shown that using multiple transmit antennas and space-time block coding provides remarkable performance at the expense of almost no extra processing.
Journal ArticleDOI
Signal design for transmitter diversity wireless communication systems over Rayleigh fading channels
TL;DR: Simulation results are compared to, and shown to be superior to, that of an intentional frequency offset system over a wide range of system parameters.
References
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Book
Microwave Mobile Communications
William C. Jakes,Donald C. Cox +1 more
TL;DR: An in-depth and practical guide, Microwave Mobile Communications will provide you with a solid understanding of the microwave propagation techniques essential to the design of effective cellular systems.
Journal ArticleDOI
BER performance of QDPSK with postdetection diversity reception in mobile radio channels
Fumiyuki Adachi,K. Ohno +1 more
TL;DR: In this paper, the bit error rate performance of Nyquist raised-cosine-filtered quaternary differential phase shift keying (RC-QDPSK) and pi/4-shift RMS with postdetection diversity reception is theoretically analyzed for Rayleigh fading channels.
Journal ArticleDOI
Indoor radio communications using time-division multiple access with cyclical slow frequency hopping and coding
TL;DR: A flexible, robust, multichannel time-division-multiple-access (TDMA) radio communications system that is ideally suited for portable as well as mobile indoor use and the ability to combat interference is one of the salient features of this system.
Journal ArticleDOI
Multitransmitter digital signal transmission by using offset frequency strategy in a land-mobile telephone system
T. Hattori,K. Hirade +1 more
TL;DR: In this paper, an offset carrier frequency allocation method is proposed for a high capacity land-mobile telephone system which employs a small zone technique, and the simulation test results are presented which determine the design parameters.
Journal ArticleDOI
Double error probability in differential PSK
J.F. Oberst,D.L. Schilling +1 more
TL;DR: A solution for the probability ofdouble errors in differentially coherent phase shift keyed (PSK) communication systems is presented which is simpler than previous analyses and which focuses on the cause of double errors.