Title :
Hybrid ARQ with ratio threshold combining for frequency-hop communication systems
Author :
Block, Fred J. ; Baum, Carl W.
Author_Institution :
Dept. of Electr. & Comput. Eng., Clemson Univ., SC, USA
Abstract :
In channels affected by strong interference, the throughput of frequency-hop spread-spectrum communication systems employing hybrid automatic repeat request protocols can be unacceptably low. We show that significant improvements in throughput can be achieved by combining symbols between the different transmissions. Several symbol combining techniques based on Viterbi´s ratio threshold test are proposed and are shown to provide significant improvements in performance
Keywords :
Viterbi detection; automatic repeat request; error correction codes; error detection codes; frequency hop communication; protocols; radiofrequency interference; spread spectrum communication; telecommunication channels; Viterbi ratio threshold test; frequency hop spread spectrum communication; hybrid ARQ; hybrid automatic repeat request protocols; interference; performance; ratio threshold combining; telecommunication channels; throughput; Additive noise; Automatic repeat request; Decoding; Envelope detectors; Error correction codes; Frequency; Interference; Testing; Throughput; Viterbi algorithm;
Conference_Titel :
Southeastcon '97. Engineering new New Century., Proceedings. IEEE
Conference_Location :
Blacksburg, VA
Print_ISBN :
0-7803-3844-8
DOI :
10.1109/SECON.1997.598691
