By Topic

Parallel turbo-TCM schemes using recursive convolutional GF(2N) encoders over frequency non-selective fading channel

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$33 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

4 Author(s)
Călin Vlădeanu ; Telecommunications Department, University Politehnica of Bucharest, Romania ; Adrian Florin Păun ; Radu Lucaciu ; Safwan El Assad

In this paper, recursive convolutional encoders over Galois field GF(2N) are used as constituent codes in a parallel turbo trellis coded modulation (turbo TCM) scheme. These encoders are designed using the nonlinear left-circulate (LCIRC) function. The LCIRC function performs a bit left circulation over the representation word. An optimum 1-delay GF(2N) recursive convolutional encoder scheme using LCIRC (RC-LCIRC) is proposed for phase shift keying - trellis-coded modulation (PSK-TCM) schemes. The minimum Euclidian distance is estimated for these PSK-TCM schemes and it is shown that these structures offer the maximum coding gains. As advantage, the RC-LCIRC encoders are less complex than the corresponding binary encoders for a fixed encoding rate. The parallel turbo TCM transmission schemes with optimum RC-LCIRC encoder as component encoder are investigated using the iterative symbol-by-symbol log-MAP algorithm in the receiver. The considered modulations schemes are 8-PSK and 16-quadrature amplitude modulation (16-QAM). The bit error rate (BER) is estimated by simulation for the proposed turbo TCM transmissions over a frequency non-selective fading channel with additive white Gaussian noise (AWGN). The simulation results are similar to the conventional turbo TCM schemes.

Published in:

Electronics and Telecommunications (ISETC), 2010 9th International Symposium on

Date of Conference:

11-12 Nov. 2010