Title :
Spectral efficiency of packet transmission with adaptive uncoded signaling compared to channel capacity
Author :
Driessen, Peter E.
Author_Institution :
Dept. of Electr. Comput. Eng., Victoria Univ., BC, Canada
Abstract :
The throughput performance (spectral efficiency) versus SNR of packet transmission using uncoded signalling is compared to channel capacity. It is shown that the uncoded M-QAM signalling is 8.25 ± 0.5 dB away from capacity over a wide range of block lengths L. For m-chip spread spectrum, the corresponding value is 10.5 dB. This result may be useful for evaluating the benefit of adaptive signalling in various system contexts without the need to refer to a specific air interface.
Keywords :
adaptive signal processing; channel capacity; quadrature amplitude modulation; telecommunication signalling; M-QAM signalling; Shannon capacity; adaptive uncoded signaling; channel capacity; m-chip spread spectrum; packet transmission; quadrature amplitude modulation; signal-to-noise ratio; spectral efficiency; Bit error rate; Channel capacity; Error correction codes; Multiaccess communication; Proposals; Quadrature amplitude modulation; Signal to noise ratio; Spread spectrum communication; Throughput; Upper bound;
Conference_Titel :
Communications, Computers and signal Processing, 2003. PACRIM. 2003 IEEE Pacific Rim Conference on
Print_ISBN :
0-7803-7978-0
DOI :
10.1109/PACRIM.2003.1235755
