A new digital transmitter based on delta sigma modulator( DSM) with bus-splitting is presented in this paper. The second order low pass error-feedback delta sigma modulator( EF-DSM) is focused. The signal to noise rat...A new digital transmitter based on delta sigma modulator( DSM) with bus-splitting is presented in this paper. The second order low pass error-feedback delta sigma modulator( EF-DSM) is focused. The signal to noise ratio( SNR) of the EF-DSM is derived for different bus-splitting bits.Following the EF-DSM,a multi-bit digital up mixer is used for carrier frequency transform. In order to validate the theory of bus-splitting,two types of transmitters are implemented on FPGA for comparison,in which one is with non-bus-splitting and the other is with bus-splitting. The FPGA implemented transmitter with bus-splitting promotes the maximum operation speed by 39%,and reduces hardware consumptions more than 16%. Both single tone and orthogonal frequency division multiplexing( OFDM) signal source are used to evaluate the proposed transmitter.展开更多
基金Supported by the National Natural Science Foundation of China(No.61674037)National Key Research and Development Program of China(No.2016YFC0800400)+1 种基金the Priority Academic Program Development of Jiangsu Higher Education Institutionsthe National Power Grid Corp Science and Technology Project(No.SGTYHT/16-JS-198)
文摘A new digital transmitter based on delta sigma modulator( DSM) with bus-splitting is presented in this paper. The second order low pass error-feedback delta sigma modulator( EF-DSM) is focused. The signal to noise ratio( SNR) of the EF-DSM is derived for different bus-splitting bits.Following the EF-DSM,a multi-bit digital up mixer is used for carrier frequency transform. In order to validate the theory of bus-splitting,two types of transmitters are implemented on FPGA for comparison,in which one is with non-bus-splitting and the other is with bus-splitting. The FPGA implemented transmitter with bus-splitting promotes the maximum operation speed by 39%,and reduces hardware consumptions more than 16%. Both single tone and orthogonal frequency division multiplexing( OFDM) signal source are used to evaluate the proposed transmitter.
