Concatenation of BCH Code With Space Time Code a Low SNR Approach for Communication Over Power Lines for Substation Automation
A study of power line as communication medium for narrowband application is performed in the perspective of space time coding. The spatial diversity available in the naturally decoupled phases of the power line can be exploited for using power line as communication medium for narrowband application just as incase of fading channel of a wireless communication. In this paper, a study is performed to test the transmission of digital data using simulated power line. Time and frequency dependent transfer function of the power line is varied instantaneously during data transmission, which is a characteristic of the power line. Impulsive disturbance on the power line is modeled using Middleton class-A noise. BCH code is used as outer code to reduce the SNR requirement.