BER ( Bit Error Rate )

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.

                          Coding of Estimated  BER

Class BER	BER Interval (%)
0	BER% < 0.01
1	0.01 ≤ BER% < 0.1
2	0.1 ≤  BER% < 0.5
3	0.5 ≤  BER% < 1.0
4	1.0 ≤  BER% < 2.0
5	2.0 ≤  BER% < 4.0
6	4.0 ≤  BER% < 8.0
7	8.0 ≤  BER%