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An energy-efficiency 16-QAM/MSK transmitter (TX) working at 432 MHz is presented for the short range communications. By adopting the edge-combining power amplifier (ECPA), only an injection-locked ringing oscillator (ILRO) with very low frequency is required, in comparison to the high frequency local oscillator in conventional TX's, which helps to reduce the power consumption of this TX significantly...
This paper presents a new delta-sigma-based transmitter architecture with quantization noise reduction and coding efficiency enhancement for multi-mode wireless sensor network (WSN) applications. The proposed architecture utilizes a finite impulse response (FIR) filter embedded digital power amplifier (DPA) controlled by the output of a 1-bit second order low pass delta-sigma modulator (LPDSM) for...
This paper proposes a pre-equalized transmission scheme based on a finite field transform. Unlike orthogonal frequency division multiplexing (OFDM) which transmits signals on orthogonal sub- carriers at the transmitter and explores post-equalization to migrate the effect of multi-path fading at the receiver, in the proposed scheme, signals are processed with the finite field transform called basefield...
This paper addresses the scheduling problem for multiuser multi-input multi-output (MU-MIMO) system based on Tomlinson-Harashima Precoding (THP). By considering the channel gain and channel correlation jointly, a low-complexity multiuser scheduling approach is proposed. Compared with the existing scheduling schemes, the proposed scheme can avoid complicated searching process, and thus reduce the scheduling...
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