Bit Error Rate (BER)

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The environmental effects on the received signal produce interference and impairments in the form of Bit Error Rate (BER). BER is defined as the ratio of the number of incorrect bits received versus the total number of bits. BER is estimated by the RBS on the reverse-link and by the MS on the forward-link. IS-136 does not state explicitly how the BER should be estimated but does specify the recommended accuracy for BER estimations. BER measures the effects of radio environment-introduced impairments which are discussed in the Speech Quality and Link Budget documents in this RF module.

Bit error rates are reported in Classes as shown in Table




The BER is estimated by comparing the detected bits (after deinterleaving) with the decoded bits that have been encoded. The BER Classes represent the BER before any forward error correction takes place.

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