Subspace blind adaptive detection for multiuser CDMA
نویسندگان
چکیده
منابع مشابه
Subspace blind adaptive detection for multiuser CDMA
Direct adaptive realizations of the linear minimum mean-square error (MMSE) receiver for direct-sequence code-division multiple access possess the attractive feature of not requiring any explicit information of interference parameters such as timing, amplitudes, or spreading sequences; however, they need a training sequence for the desired user. Recently, a new blind adaptive receiver was propo...
متن کاملSubspace multiuser detection for multicarrier DS-CDMA
A subspace-based linear minimum mean-squared error (MMSE) multiuser detection scheme is proposed for a multicarrier direct-sequence code-division multiple-access (MC-DSCDMA) system. Typically, a MC-DS-CDMA system employs a band-limited chip waveform. The band-limited nature of the chip waveform causes problem in applying standard subspace techniques because no nonnull noise subspace can be form...
متن کاملSubspace-Based Blind Adaptive Multiuser Detection Using Kalman Filter
A new blind adaptive multiuser detection scheme based on a hybrid of Kalman filter and subspace estimation is proposed. It is shown that the detector can be expressed as an anchored signal in the signal subspace and the coefficients can be estimated by the Kalman filter using only the signature waveform and the timing of the desired user. The resulting subspace-based algorithm brings the benefi...
متن کاملGroup-blind multiuser detection for uplink CDMA
The recently developed blind techniques for multiuser detection in code division multiple access (CDMA) systems lead to several near–far resistant adaptive receivers for demodulating a given user’s data with the prior knowledge of only the spreading sequence of that user. In the CDMA uplink, however, typically the base station receiver has the knowledge of the spreading sequences of all the use...
متن کاملBlind adaptive multiuser detection
The decorrelating detector and the linear minimum mean-square error (MMSE) detector are known to be effective strategies to counter the presence of multiuser interference in code-division multiple-access channels; in particular, those multiuser detectors provide optimum near-far resistance. When training data sequences are available, the MMSE multiuser detector can be implemented adaptively wit...
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ژورنال
عنوان ژورنال: IEEE Transactions on Communications
سال: 2000
ISSN: 0090-6778
DOI: 10.1109/26.818885