CDMA Multipath Channel Estimation Using Generalized Successive Interference Cancellation Algorithm For Radiolocation
ثبت نشده
چکیده
منابع مشابه
Geometric derivation of expectation-maximization and generalized successive interference cancellation algorithms with applications to CDMA channel estimation
The expectation-maximization (EM) algorithm is well established as a computationally efficient method for separable signal parameter estimation. Here, a new geometric derivation and interpretation of the EM algorithm is given that facilitates the understanding of EM convergence properties. Geometric considerations lead to an alternative separable signal parameter estimator based on successive c...
متن کاملEM-based acquisition of DS-CDMA waveforms for radiolocation
ABSTRACT A handshaking protocol for radiolocation is considered using DS-CDMA packet transmission. The expectation maximization (EM) algorithm is employed for code delay acquisition. It is shown that the systematic application of EM on the flat-fading channel yields a parallel interference cancellation (PIC)-based technique for acquisition. On the frequency-selective channel, it is necessary to...
متن کاملGeneralized Successive Interference Cancellation/Matching Pursuits Algorithm for DS-CDMA Array-Based Radiolocation and Telemetry
A radiolocation problem using DS-CDMA waveforms with array-based receivers is considered. It is assumed that M snapshots of Ns Nyquist sample long data are available, with a P element antenna array. In the handshaking radiolocation protocol assumed here, data training sequences are available for all K users. As a result, the received spatial-temporal matrix R ∈ CMNs×P is approximated by a sum o...
متن کاملSuccessive interference cancellation in a low-earth orbit satellite system
Successive interference cancellation is a promising technique for increasing the capacity of uplink CDMA channels. In this paper, the technique is extended to a low-earth orbit satellite channel. Unlike terrestrial cellular channels, satellite channels typically have a limited multipath profile, but significant closed-loop power control error due to the round-trip delay incurred in communicatin...
متن کاملAmplitude and Phase Estimation Considerations for Asynchronous CDMA with Successive Interference Cancellation
Successive interference cancellation, in conjunction with very low rate convolutional codes, has been shown to approach the Shannon capacity of a Gaussian channel [1]. This approach to CDMA is very well suited to asynchronous (uplink) wireless channels. However, accurate phase and amplitude estimation is required for effective operation. In this paper, we develop a power control algorithm speci...
متن کامل