One-tap Equalizer Research Articles

Cyclic prefixed single carrier and multicarrier transmission: bit rate comparison

We consider cyclic prefixed single carrier and adaptive multicarrier transmission over a frequency selective channel. We compare the achievable bit rate for a target bit error rate. We analytically prove that the bit rate achieved with multicarrier transmission with adaptive modulation is always higher than that obtained with single carrier transmission when a one-tap frequency domain equalizer is used. We also show that the same adaptively loaded multicarrier scheme reaches the performance of single carrier transmission with a block decision-feedback equalizer.

Spatial-frequency channel and DOA joint blind estimator for MC-CDMA systems

The MC-CDMA (Multicarrier Code Division Multiple Access) technique is known to be appropriate for high-data-rate wireless communications due to its robustness to multipath fading and its capability of handling high data rates with a simple one-tap equalizer. This paper investigates a uniform linear antenna array at the base station for macrocell MC-CDMA systems in a frequency-selective fading channel environment, and develops a blind joint estimator for the spatial-frequency channel and the DOA (Direction-Of-Arrival). By constructing the matrix including both spatial-frequency channel and DOA information, and performing eigen decomposition on it, the closed-form solution of spatial-frequency channels and DOAs for all active users within the macrocell can be obtained. The overall performance using this novel scheme is demonstrated by extensive computer simulations.

The autocorrelation of error propagation in a one-tap decision-feedback equalizer

The autocorrelation function of error propagation for a one-tap decision-feedback equalizer is derived. The autocorrelation is shown to be a geometric sequence which may or may not have alternating sign depending on the channel impulse response. >