{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2022,4,1]],"date-time":"2022-04-01T12:51:40Z","timestamp":1648817500236},"reference-count":24,"publisher":"World Scientific Pub Co Pte Lt","issue":"05","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J CIRCUIT SYST COMP"],"published-print":{"date-parts":[[2017,5]]},"abstract":"<jats:p> This paper introduces an architecture to enhance coding efficiency (CE) and bandwidth of the delta-sigma modulator (DSM) transmitters. In this architecture a low-pass envelope DSM (LPEDSM) is used instead of the traditional Cartesian low-pass DSM (LPDSM) to reduce the quantization noise and to improve the coding efficiency. The simulation results show that for an uplink long-term evolution (LTE) signal with 1.92[Formula: see text]MHz bandwidth, 7.8[Formula: see text]dB peak-to-average power ratio (PAPR), and an oversampling ratio (OSR) of 32, the CE for the polar LPEDSM transmitter is equal to 41.72% in comparison to 9.7% CE for the Cartesian LPDSM transmitter. In the next step, the CE and bandwidth of the transmitter are improved at the same time by using the quantization noise reduction technique in the polar LPEDSM transmitter with parallel baseband. By using this combined technique in the four-branch transmitter baseband part for an uplink LTE signal with 7.68[Formula: see text]MHz bandwidth, 7.8[Formula: see text]dB PAPR, and an OSR of 32, the CE is improved from 42.59% to 55.86% with 40[Formula: see text]dB signal-to-noise-and-distortion ratio (SNDR) while the clock speed is only 61.44[Formula: see text]MHz which is four times lower than the clock speed requirement of the conventional transmitter baseband part to achieve the same SNDR. <\/jats:p>","DOI":"10.1142\/s0218126617500852","type":"journal-article","created":{"date-parts":[[2016,12,23]],"date-time":"2016-12-23T06:34:46Z","timestamp":1482474886000},"page":"1750085","source":"Crossref","is-referenced-by-count":2,"title":["Coding Efficiency and Bandwidth Enhancement in Polar Delta-Sigma Modulator Transmitter Using Quantization Noise Reduction and Parallel Processing Techniques"],"prefix":"10.1142","volume":"26","author":[{"given":"Nasser Erfani","family":"Majd","sequence":"first","affiliation":[{"name":"Department of Electrical Engineering, Shohadaye Hoveize University of Technology, Susangerd, Khouzestan, Iran"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hassan Ghafoori","family":"Fard","sequence":"additional","affiliation":[{"name":"Department of Electrical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Abbas","family":"Mohammadi","sequence":"additional","affiliation":[{"name":"Department of Electrical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"219","published-online":{"date-parts":[[2017,2,8]]},"reference":[{"key":"S0218126617500852BIB001","volume-title":"RF Power Amplifiers for Wireless Communications","author":"Cripps S. 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