| Paper: | SPCOM-P8.1 | ||
| Session: | Synchronization and Timing Recovery | ||
| Time: | Thursday, May 20, 13:00 - 15:00 | ||
| Presentation: | Poster | ||
| Topic: | Signal Processing for Communications: CDMA and Spread-Spectrum Systems | ||
| Title: | A DETERMINISTIC MULTIUSER CODE-TIMING ESTIMATOR FOR LONG-CODE BANDLIMITED CDMA SYSTEMS | ||
| Authors: | Rensheng Wang; Stevens Institute of Technology | ||
| Hongbin Li; Stevens Institute of Technology | |||
| Abstract: | In this paper, we present a deterministic multiuser code-timingestimator for asynchronous direct-sequence (DS) code-divisionmultiple-access (CDMA) systems with aperiodic long spreadingcodes and bandlimited chip waveforms. A key feature of the proposed estimator is that it captures and capitalizes a deterministic structure of the overall interference, namelymulti-access interference (MAI) and inter-symbol interference (ISI), in the frequency domain. This allows complete interferenceelimination in a deterministic manner, which is in general moreeffective and data-efficient than stochastic approaches. Numerical results show that the proposed estimator can achieve fast acquisition; it is also near-far resistant, providing accurate code acquisition for even overloaded systems (i.e., systems with more users than the processing gain) in multipath fading environments. | ||
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