Accession Number:

ADA207964

Title:

Packet-Error Probability Analysis for Unslotted FH-CDMA (Frequency Hopped-Code-Division Multiple-Access) Systems with Error Control Coding

Descriptive Note:

Interim rept.

Corporate Author:

NAVAL RESEARCH LAB WASHINGTON DC

Report Date:

1989-04-28

Pagination or Media Count:

19.0

Abstract:

In unslotted frequency-hopped FH code-division multiple-access CDMA systems, a number of users can simultaneously transmit their packets by using quasi-orthogonal FH patterns codes. The number of interfering users varies throughout the packet duration thus, the symbol error probability is not constant throughout the transmission, and symbol errors with the packet are not independent. In this report we present an exact analysis of such systems that use Reed-Solomon error-control coding. The computational task for the evaluation of the performance is enormous thus, bounds and approximations are derived that are easier to compute and that prove to be very close to the exact results for the cases in which the exact results are computable. The results of this study confirm our observation, made also elsewhere, that the widely used threshold- based model of other-user interference is not an accurate one.

Subject Categories:

  • Numerical Mathematics
  • Statistics and Probability
  • Computer Programming and Software
  • Command, Control and Communications Systems

Distribution Statement:

APPROVED FOR PUBLIC RELEASE