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Fast verification of the prototype design on software radio platform has become one of the most important research topics in communication systems. Based on OFDM receiver which is implemented on FPGA, the paper focuses on many key issues in the implementation of the strategy in software wireless platform such as OFDM frame synchronization, frequency compensation, symbol timing, etc. The proposed corresponding...
This paper proposes an improved scheme of a spread spectrum transceiver based on FPGA, which is capable of meeting wide application requirements. In order to improve the efficiency, two critical modules are refined, one is a modified matched filter, and the other one is an improved digital carrier recovery loop. Compared with the typical matched filter scheme, the modified one can save about 31.48%...
This paper presents a combinational synchronization method including symbol timing synchronization, fractional frequency estimate and integer frequency estimate applied to an OFDM system based on FPGA. An estimator for OFDM symbol timing synchronization and fractional frequency offsets is proposed based on conjugate multiplication, Cordic algorithm and autocorrelation properties of PN (pseudo noise)...
In this paper, an improved carrier synchronization scheme using Costas Loop is proposed for all digital DQPSK receivers. Compared with the classic Costas Loop, this new scheme not only eases the operating load, but also reduces almost 10% of thermal power dissipation. Moreover, as the design is adopted all digitally, this scheme doesn't need analog devices and shorten the carrier recover time. Consequently,...
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