Investigation of Direct Delta Sigma Receiver for Modern Cellular Systems

Abstract

Abstract This paper presents the significance of Direct Delta Sigma Receiver (DDSR) in modern cellular communication systems. The development of 4G/5G technologies such as LTE and WiMax is increased the need of digital technology and new solutions for cellular systems. Due to the demand of digitalization in modern cellular applications which leads to minimize the analog circuits, support frequency-agile and several bandwidths, DDSR is introduced and becomes more popular than other conventional receivers. DDSR is the combination of front end of direct conversion receiver and Delta Sigma Modulator (DSM). The importance and structure of DDSR are studied. In DDSR, quantization noise shaping with filtering can be provided by the feedback loop. The filter coefficients are mapped to the properties of RF circuits at the front end is more challenging and difficult task. Optimization of filter coefficients plays an important role in DDSR. In future, optimization methods and algorithms can be efficiently used to optimize filter coefficients in DDSR.