Title :
Computer simulation of human body effects on communication performance of a portable radio in urban mobile environments based on EVM and BER evaluation
Author :
Lin, Fu-Ling ; Chuang, Huey-Ru
Author_Institution :
Dept. of Electr. Eng., Nat. Cheng Kung Univ., Tainan, Taiwan
Abstract :
This paper presents the performance evaluation of a portable radiophone including the operator´s body effects, based on the EVM (error vector magnitude) and BER (bit error rate) simulation, in urban mobile environments for digital wireless communications. A new probability density function (pdf) is proposed to describe the statistic of the EVM in an AWGN channel under a frequency nonselective slowly fading situation. The approach of the computer simulation combines the modified Doppler power spectrum (MDPS) method and a gray coding π/4-DQPSK modulation with square-root raised cosine (SRRC) shaping filter. The results show that the closer the distance between the antenna of the radio and the operator´s head, the poorer the EVM and the BER performance of the portable radiophone
Keywords :
AWGN channels; Doppler effect; Gray codes; Rayleigh channels; digital radio; error statistics; mobile radio; probability; quadrature phase shift keying; telephone sets; AWGN channel; BER evaluation; EVM evaluation; MDPS method; Rayleigh channels; SRRC shaping filter; bit error rate; communication performance; digital wireless communications; error vector magnitude; frequency nonselective slowly fading channel; gray coding π/4-DQPSK modulation; human body effects; modified Doppler power spectrum; portable radio; portable radiophone; probability density function; square-root raised cosine; urban mobile environments; Biological system modeling; Bit error rate; Computational modeling; Computer errors; Computer simulation; Humans; Mobile communication; Probability density function; Statistics; Wireless communication;
Conference_Titel :
Vehicular Technology Conference, 1999. VTC 1999 - Fall. IEEE VTS 50th
Conference_Location :
Amsterdam
Print_ISBN :
0-7803-5435-4
DOI :
10.1109/VETECF.1999.797290
