Volume 26, Issue 1, July 2014

Solution for Improving Bit Error Rates (BER) in Microwave Long Haul Links [Full Text]

Ahmed Qaddus, Muhammad Irfan and Aamir Ali Raza

Abstract— In the recent years there is a tremendous boost in the demand of triple play applications like voice, data and video in Wireless Telecom sector. For providing triple play applications like voice, data and video to customers the common wireless backhaul media used by the telecom operators today is Microwave radio links. Microwave radio links are designed on the princi- ple of point to point wireless architecture. The Microwave radio links are used for transmission of E1’s, STM-1 and Ethernet Traf- fic. Single Microwave radio link in (1+0) configuration can carry data traffic up to 155.5 Mbps which is equivalent to STM-1. When Microwave radio links are deployed over large ranges then signal to noise ratio (SNR) levels start to degrade, which causes increase in bit error rates (BER) which result in latency levels above 1 msec, which are not desirable for data transmission. In this research the Authors have practically implemented solution in field for improving bit error rates (BER) in Microwave radio links. The real time results for latency measurement are calculated before and after the proposed changes with the help of JDSU 6000 Generator and Test equipment. The proposed changes focus on antenna alignment and requirement of different an- tenna sizes used during Microwave radio link installations on extensive hops.