NDLI: The effects of time-delay spread on unequalized TCM in a portable radio environment

Content Provider	IEEE Xplore Digital Library
Author	Chen, Y. Chuang, J.C.-I.
Copyright Year	1967
Abstract	This paper studies the effects of time-delay spread on trellis-coded modulation (TCM) in portable radio channels, where equalization is not employed to mitigate frequency-selective fading. The average irreducible bit error rate (BER) of three different TCM schemes are analytically formulated first and then numerically evaluated by simulation. The results for a delay spread lower than 0.2 of the symbol period indicate that the performance of TCM schemes with interleaving/deinterleaving is much better than that of QPSK, and better TCM schemes for flat fading also give better performance under low delay spread. Analytical results indicate that a good TCM scheme in frequency-selective fading channels should have both a large Euclidean distance and a high degree of built-in time diversity. If higher time-delay spread is encountered, TCM does not have advantages over QPSK. We also compare TCM performance with and without diversity. It is found that diversity greatly improves the performance under low delay spread, while the diversity gain quickly diminishes as the RMS delay spread approaches 0.2 of the symbol period.
Sponsorship	IEEE Vehicular Technology Society
Starting Page	375
Ending Page	380
Page Count	6
File Size	197699
File Format	PDF
ISSN	00189545
Volume Number	46
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1997-05-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Delay Bit error rate Quadrature phase shift keying Frequency Analytical models Numerical simulation Interleaved codes Frequency-selective fading channels Euclidean distance Diversity methods
Content Type	Text
Resource Type	Article
Subject	Applied Mathematics Automotive Engineering Computer Networks and Communications Electrical and Electronic Engineering Aerospace Engineering

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

The effects of time delay spread on unequalized tcm in a portable radio environment.

The effects of time delay spread on TCM in portable radio environments

Comparison of QPSK and TCM schemes in frequency-selective fading channels

Trellis coded modulation on time-selective fading channels

Switched-diversity FSK in frequency-selective Rayleigh fading

Performance comparison of antenna diversity and slow frequency hopping for the TDMA portable radio channel

Collaborative communications using bit-Interleaved coded DPSK with cyclic delay diversity

The Effects of Time Delay Spread on Portable Radio Communications Channels with Digital Modulation

A 4-state asymmetric 8-PSK TCM scheme for Rayleigh fading channels

The effects of time-delay spread on unequalized TCM in a portable radio environment

Similar Documents

The effects of time delay spread on unequalized tcm in a portable radio environment.

The effects of time delay spread on TCM in portable radio environments

Comparison of QPSK and TCM schemes in frequency-selective fading channels

Trellis coded modulation on time-selective fading channels

Switched-diversity FSK in frequency-selective Rayleigh fading

Performance comparison of antenna diversity and slow frequency hopping for the TDMA portable radio channel

Collaborative communications using bit-Interleaved coded DPSK with cyclic delay diversity

The Effects of Time Delay Spread on Portable Radio Communications Channels with Digital Modulation

A 4-state asymmetric 8-PSK TCM scheme for Rayleigh fading channels

The effects of time-delay spread on unequalized TCM in a portable radio environment