Title :
Analysis of Plain and Diversity Combining Hybrid ARQ Protocols Over the
-Ary Asymmetric Channel
Author :
Tallini, Luca G. ; Elmougy, Samir ; Bose, Bella
Author_Institution :
Dipt. di Sci. delta Comunicazione, Universita degli Studi di Teramo
Abstract :
In the automatic repeat request (ARQ) protocol, the sender keeps retransmitting a code word until it receives a positive acknowledgment from the receiver sent through the feedback channel. This correspondence proposes plain and diversity combining hybrid ARQ protocol communication schemes suitable for the m(ges2)-ary asymmetric channel using t-asymmetric error correcting/all asymmetric error detecting (t-AEC/AAED) codes. The analysis shows that error correction definitely improves the throughput of the system compared to the ARQ protocol which uses only error detecting codes. The correspondence provides simple analytic expressions for the average number of transmissions of a code word in both plain and diversity combining t-AEC/AAED ARQ (tges0) protocol systems over the m-ary asymmetric channel, mges2. An example is shown on how to get very close to the Z-channel capacity
Keywords :
automatic repeat request; channel capacity; diversity reception; error correction codes; error detection codes; feedback; AAED; ARQ; Z-channel capacity; all asymmetric error detecting code; code word retransmission; diversity combining; feedback channel; hybrid automatic repeat request protocol; m-ary asymmetric channel; receiver; t-AEC; t-asymmetric error correcting code; Automatic repeat request; Diversity reception; Error correction; Error correction codes; Feedback; Forward error correction; Image analysis; Optical fiber communication; Protocols; Very large scale integration; $m$-ary alphabet; Asymmetric errors; VLSI systems; Z-channel; automatic repeat request (ARQ ) protocols; diversity combining; error correcting/detecting codes; optical communication;
Journal_Title :
Information Theory, IEEE Transactions on
DOI :
10.1109/TIT.2006.885524