Indoor Wireless Audio Communication Circuit Design And Implementation

Modern wireless communication technology has become more mature, the requirements of communication rate are also increasing, to meet the more and more customers. Although the communication band is limited, CDMA that is based upon spreading spectrum processing techniques can improve the information transmission rate. Thus, in a wireless communication system, the main directions of this research is to designer and implement a wireless system integrated circuits on CDMAWith the rapid growth of mobile data, the digital information processing technology is used widely, FPGA (field programmable gate array), in the field of digital signal processing, are playing an increasingly important role. This thesis is based on the high-speed, high-capacity FPGA and zero-IF, gathering sending and receiving,dual-channel, radio frequency processing chip MAX2837 of MAXIM, to achieve high-speed, spreading spectrum processing voice signals.This technique could be applied to in-room wireless audio conference system, to achieve indoor voice signal transmission and reception. This thesis studies the designer and implementation of baseband audio circuits.Firstly, this thesis introduces the research background and the main content of indoor wireless audio conference system, then introduces the current development during home and abroad of integrated circuit and other aspects.Secondly, this thesis introduces the framework of the system, which is on the use of FPGA and MAX2837 high-speed wireless communication system;then proposes system designer ideas. In addition,this thesis introduces signal integrity and electromagnetic compatibility, which is the key technology in the process of the hardware circuit design.Thirdly, this thesis from the system requirements, the key parameters, chip selection, and other aspects of description of each module of the system circuit, described the designer and implementation of methods unit module circuit;the circuit principle diagram and PCB was designed and implemented,Using EDA software.Fourthly, this paper introduces in detail the key technology of system circuit design, including the signal integrity and electromagnetic compatibility of audio signal.Fifthly,this paper introduces the hardware test of this system circuit,which is designed by altium designer software, determine the design can realize the system function.Finally, the designer and implementation of systems and circuits are summarized and puts forward a prospect in accordance with summary.