Among the wireless personal area networks, much attention has been placed on the HomeRF system due to the simple hardware complexity. In this letter, we propose several techniques for the HomeRF system. First, a DC-offset compensation technique is considered for HomeRF system. In addition, a decision directed channel estimation technique is proposed. The proposed techniques require no additional training sequence and a little additional hardware. And finally, a turbo coding technique is considered as a improved coding scheme. It is shown that the performance of the proposed algorithm is significantly improved in comparison with the conventional HomeRF system.

This letter presents a channel estimation and a DC-offset estimation technique in a short-ranged Bluetooth system. Each of the Bluetooth devices in the connection state knows the access codes used in the ad-hoc networks, which is utilized as a reference signal for the parameter estimation. The proposed estimators can be implemented without degradation of frame and spectral efficiency thanks to using the access code specified for the Bluetooth system.