Iterative Signal Processing for Blind Code Phase Acquisition of CDMA 1x Signals for Radio Spectrum Monitoring

Joint Authors

Lodge, John
Kerr, Ron

Source

Journal of Electrical and Computer Engineering

Issue

Vol. 2010, Issue 2010 (31 Dec. 2010), pp.1-8, 8 p.

Publisher

Hindawi Publishing Corporation

Publication Date

2010-09-19

Country of Publication

Egypt

No. of Pages

8

Main Subjects

Engineering Sciences and Information Technology
Information Technology and Computer Science

Abstract EN

This paper addresses the problem of recovering the code phase of the composite spreading sequence for a CDMA 1x signal transmitted from a handset, without the benefit of a priori information from the system.

The spreading code is required for the radio spectrum monitoring system for signal detection and measurements rather than for communications.

The structure of the CDMA 1x signal is exploited by processing sequential pairs of received samples to form a single soft sample for each pair.

The approach models the combination of the long-code generator and the two short-code generators, along with the pair-wise processing, by a single linear system over GF(2), with the initial states of the long- and short-code generators forming the input vector.

Consequently, a vector of the pair-wise soft samples can be treated as a noisy received codeword that is decoded using iterative soft-in decoding techniques.

If the decoder yields the correct candidate “codeword,” the original states of the code generators can be computed.

This approach does not require direct access to the transmitted spreading sequence but can be applied to the data modulated signal.

Simulation results provide performance estimates of the method with noise, Rayleigh fading, and co-channel interference.

American Psychological Association (APA)

Kerr, Ron& Lodge, John. 2010. Iterative Signal Processing for Blind Code Phase Acquisition of CDMA 1x Signals for Radio Spectrum Monitoring. Journal of Electrical and Computer Engineering،Vol. 2010, no. 2010, pp.1-8.
https://search.emarefa.net/detail/BIM-460110

Modern Language Association (MLA)

Kerr, Ron& Lodge, John. Iterative Signal Processing for Blind Code Phase Acquisition of CDMA 1x Signals for Radio Spectrum Monitoring. Journal of Electrical and Computer Engineering No. 2010 (2010), pp.1-8.
https://search.emarefa.net/detail/BIM-460110

American Medical Association (AMA)

Kerr, Ron& Lodge, John. Iterative Signal Processing for Blind Code Phase Acquisition of CDMA 1x Signals for Radio Spectrum Monitoring. Journal of Electrical and Computer Engineering. 2010. Vol. 2010, no. 2010, pp.1-8.
https://search.emarefa.net/detail/BIM-460110

Data Type

Journal Articles

Language

English

Notes

Includes bibliographical references

Record ID

BIM-460110