Near-far problem on hybrid direct-sequence/slow-frequency-hopping spread-spectrum multiple-access

Author

Yamazato, Takaya ; Shinkaji, Yasuhiko ; Katayama, Masaaki ; Ogawa, Akira

Author_Institution

Dept. of Inf. Eng., Nagoya Univ., Japan

Volume

1

fYear

1994

fDate

18-23 Sep 1994

Firstpage

319

Abstract

This paper investigates the bit error rate (BER) performance of hybrid direct-sequence/slow-frequency-hopping spread-spectrum multiple-access (DS/SFH-SSMA) operating in the environment with the near-far problem. Rate 1/2 convolutional code of constraint length 7 is applied with an appropriate interleaver to increase the diversity effect not only on time domain but also on frequency domain. As a result, we found that the BER performance of DS/SFH system was always satisfactory in the presence of near-far problem. On the other hand, poor BER performance of the direct-sequence system is found regardless of E_b/N₀ or number of users

Keywords

pseudonoise codes; BER; DS/SFH-SSMA; PN sequences; bit error rate; constraint length; direct-sequence spread-spectrum multiple-access; diversity effect; error correcting code; frequency domain; interleaving; mobile radio; near-far problem; rate 1/2 convolutional code; slow-frequency-hopping spread-spectrum multiple-access; time domain; Base stations; Bit error rate; Convolutional codes; Error correction codes; Frequency domain analysis; Frequency modulation; Mobile communication; Spread spectrum communication; System performance; Transmitters;

fLanguage

English

Publisher

ieee

Conference_Titel

Personal, Indoor and Mobile Radio Communications, 1994. Wireless Networks - Catching the Mobile Future., 5th IEEE International Symposium on

Conference_Location

The Hague

Print_ISBN

90-5199-193-2

Type

conf

DOI

10.1109/WNCMF.1994.530815

Filename

530815