Derivation of average bit-error rate in direct-sequence spread-spectrum communications

✍ Scribed by Masafumi Usuda; Tohru Kikuta; Fumio Takahata

• Book ID: 101294819
• Publisher: John Wiley and Sons
• Year: 2000
• Tongue: English
• Weight: 149 KB
• Volume: 83
• Category: Article
• ISSN: 8756-6621
• DOI: 10.1002/(sici)1520-6424(200005)83:5<57::aid-ecja6>3.0.co;2-m

✦ Synopsis

The Gaussian approximation is widely used as a simple method of derivation for the average bit-error rate in direct-sequence spread-spectrum communications. The Gaussian approximation cannot always derive the bit-error rate with high accuracy since the accuracy tends to be degraded with the increase of E b / N 0 when the number of interference symbols is low. This article proposes a method of theoretical analysis in which the probability density function for the composite amplitude of the interference signal is derived by faithfully following the signal processing executed in the spread-spectrum communication system, after which the bit-error rate is derived. The validity of the method is demonstrated by verifying that the bit-error rate obtained by the proposed method agrees well with the value obtained by computer simulation.