les coder we used in cdmaOne. The EVRC speech coder is a standard part of cdma2000. In the forward direction we are using an Eb/No value of 4.5 dB, half a decibel better than cdmaOne, to reflect the more efficient FEC algorithms.6 In the reverse direction, we gain the same improvement due to FEC and another 2.5 dB for the coherent demodu- lation for an Eb/No value of 4.5 dB. We continue to split the Doppler difference with d = 1 dB, with some subscribers sta- tionary, d = 0 dB, and others moving, d = 2 dB. Our data subscribers are likely to be less mobile, so we set their Doppler factor to d = 0.5 dB. We are estimating other-cell interference at one-half the power of the serving CDMA carrier, f = 0.5, and other- sector interference at 30 percent of that same power, g = 0.3, the same as cdmaOne. The forward overhead for global channels is about the same as cdmaOne, h = 0.1. The reverse direction, however, has significant overhead in cdma2000 for pilot and power control, h = 0.2, that was not present in cdmaOne. (We pay 1 dB in overhead for a 4-dB benefit from coherent demodulation and fast power control.) We consider the over- head insignificant compared with the high-speed data channel, so h = 0 for data. cdma2000 has fast power control in both directions, so we set p = -0.5 dB in the for- ward direction and p = dB in the reverse, where relative radio signal path changes are greater. The four-rate speech coder in cdmaOne and cdma2000 allows the channel to be aggressive in conserving voice call activity, SO we set U to 0.4. Our data service ex- ample has U = 0.2. If half the system is in a state of soft or softer handoff and half of those calls involve three or four sectors, then the soft-handoff factor used in the forward direction should be about S = 0.8. Orthogonal codes give us j = 0 in the forward direc- tion and j = 1 in the reverse direction because cdma2000 has no JD in the base station receiver. Finally, the multipath factor depends heavily on the radio environment, and we are figuring that the densest an