CTTB和CMMB二合一车载电视的研究与设计

Research and Design of Automobile TV with CTTB and CMMB

摘要:

随着汽车产业在中国的蓬勃发展,对汽车娱乐系统的需求也是水涨船高,数字电视也正成为新车型设计时必备的功能,汽车保有市场的需求也同样不可限量;针对中国移动电视有CMMB和CTTB两种制式,为了增强用户的收视节目数量和质量,同时使产品设计更加集成化,在此提出了一种二合一产品的研究与设计；通过实验验证,CTTB在模式4的调制模式下灵敏度达到-86 dBm,CMMB在QPSK,CR为3/4的情况下灵敏度达到-96 dBm,均优于规范要求2 dB以上；厂商实际使用结果来看,这也是一个高效和经济的解决方案。

Abstract:

With the development of automobile in China, the demand of car infotainment system is increasing. Digital TV is the essential requirement for the new car model, and there is also a big requirement for the automotive after-market. In China, there are two kinds of mobile TV, one is CTTB, and another one is CMMB. In order to satisfy end users requirement for the TV quantity and quality, to make the Digital TV product more integrated, the 2 in 1 design was introduced in this article. In the lab test, in CTTB mode 4, its sensitivity is -86dBm, in CMMB QPSK, CR 3/4 mode, its sensitivity is -96dBm, both of them are better than the standard request; and by OEM verify, this design is an efficient and economic design.