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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\u2010code generator and the two short\u2010code generators, along with the pair\u2010wise processing, by a single linear system over GF(2), with the initial states of the long\u2010 and short\u2010code generators forming the input vector. Consequently, a vector of the pair\u2010wise soft samples can be treated as a noisy received codeword that is decoded using iterative soft\u2010in decoding techniques. If the decoder yields the correct candidate \u201ccodeword,\u201d 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\u2010channel interference.<\/jats:p>","DOI":"10.1155\/2010\/282493","type":"journal-article","created":{"date-parts":[[2010,9,19]],"date-time":"2010-09-19T17:35:57Z","timestamp":1284917757000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":11,"title":["Iterative Signal Processing for Blind Code Phase Acquisition of CDMA 1x Signals for Radio Spectrum Monitoring"],"prefix":"10.1155","volume":"2010","author":[{"given":"Ron","family":"Kerr","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"John","family":"Lodge","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2010,9,19]]},"reference":[{"volume-title":"Spread Spectrum Communications","year":"1985","author":"Simon M.","key":"e_1_2_5_1_2"},{"key":"e_1_2_5_2_2","doi-asserted-by":"crossref","first-page":"217","DOI":"10.1016\/0020-0255(84)90035-5","article-title":"Sequence acquisition using bit estimation techniques","volume":"32","author":"Stuber G.","year":"1984","journal-title":"Information Sciences"},{"key":"e_1_2_5_3_2","doi-asserted-by":"publisher","DOI":"10.1002\/sat.877"},{"key":"e_1_2_5_4_2","unstructured":"3GPP2 C.S0002-C Version 2 Physical layer standard for cdma2000 spread spectrum systems rev C July2004."},{"key":"e_1_2_5_5_2","doi-asserted-by":"crossref","first-page":"475","DOI":"10.1109\/TCOM.1965.1089161","article-title":"Acquisition of pseudo-noise signals by sequential estimation","volume":"13","author":"Ward R. 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