Title :
An ARQ scheme using combined QPSK and BPSK transmissions
Author :
Lee, Shih-Kai ; Lin, Mao-Chao
Author_Institution :
Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan
fDate :
5/1/1995 12:00:00 AM
Abstract :
We propose a hybrid ARQ scheme which uses QPSK modulation for the first transmission and BPSK modulation for retransmissions. The throughput performance of the proposed ARQ scheme is better that those of ARQ schemes purely using QPSK modulation or purely using BPSK modulation for transmissions. Furthermore, the proposed scheme does not require any operation of error correction as usually required in hybrid ARQ schemes. Therefore, the ARQ scheme proposed in this paper can be easily implemented
Keywords :
Gaussian channels; automatic repeat request; linear codes; quadrature phase shift keying; AWGN channel; BPSK modulation; BPSK transmission; QPSK modulation; QPSK transmission; additive white Gaussian noise channel; hybrid ARQ scheme; linear code; retransmissions; throughput performance; Automatic repeat request; Binary phase shift keying; Codes; Communications Society; Decoding; Error correction; Forward error correction; Quadrature phase shift keying; Throughput; Transmitters;
Journal_Title :
Communications, IEEE Transactions on
