Design of power link balance of CDMA repeater and estimation of effective communication distance 善一一一瓣薅豫雕赢誊j冯Link balance design and communication distance estimation by Yang Jianwu and Zhou Lei 200233 (罗顿开发股份有限公司Shanghai Network Equipment Manufacturing Branch In 2001, China Unicom began to build a CDMA network in an all-round way and gradually released numbers to users. This \"green\" system with low radiation, small size, light weight, strong anti-mobile interference and good confidentiality is quite popular, but there are also some problems. For example, users in some areas reported that the communication effect was not good. There were problems such as the base station antenna height H1 = 1.5 m and the receiving antenna height H2 = 1 m in the car. (4) System parameters Forward working frequency f1 = 833.49 MHz, reverse working frequency f2 = 878.49 MHz, soft switching gain G3.7dB, channel bandwidth B = I.2288 MHz, coding rate C -9.6 kb/S, thermal noise coefficient = -1. The same telephone as the GS M system is difficult to make calls and has blind spots. The author conducted a preliminary investigation on the use parameters of some base station/repeater systems and conducted field tests and verifications using a dedicated road test analysis tool. It was found that some blind spots can be completely eliminated by correctly setting the repeater power control parameters...
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