| 摘要 |
1. A method for generating power control commands in a closed loop power control system in a CDMA communication system, comprising the steps of: measuring an inband energy value; measuring a pilot channel energy value to provide a non interfering energy value; scaling said pilot channel energy in accordance with a pilot fraction value to provide an interference noise value; subtracting said non interfering energy value from said inband energy value; measuring a bit energy of a received signal; computing a signal to noise ratio in accordance with said interference noise value and said bit energy; and generating a power control command in accordance with said signal to noise ratio. 2. The method of claim 1 further comprising the step of comparing said signal to noise ratio with a predetermined threshold value. 3. The method of claim 1 further comprising the step of receiving said pilot fraction value from a remote communications device. 4. The method of claim 1 wherein said step of measuring said bit energy comprises the steps of: measuring a symbol energy value; and scaling said symbol energy value in accordance with a data rate value. 5. The method of claim 4 wherein said step of measuring said bit energy comprises the steps of determining said data rate value. 6. The method of claim 4 wherein said step of measuring said bit energy comprises the steps of receiving said data rate value from a remote communication device. 7. A method for generating power control commands in a closed loop power control system in a CDMA communication system comprising the steps of: accumulating a predetermined integer number (N) samples of a demodulated signal; computing a noise value for said demodulated signal in accordance with said accumulated samples; measuring a bit energy for said demodulated signal; computing a signal to noise ratio for said demodulated signal in accordance with said noise value for said demodulated signal and said bit energy for said demodulated signal; and generating a power control command in accordance with said signal to noise ratio, wherein said step of computing a noise value for said demodulated signal comprises the steps of: summing the squares of symbol amplitudes of said accumulated symbols to provide a summed energy value, summing the symbol amplitudes of said accumulated symbols, squaring said sum of said symbol amplitudes, dividing the square of said sum of said symbol amplitudes by N to provide a normalized square value; and subtracting said normalized square value from said summed energy value and dividing the result by (N-1) to provide said noise value. 8. The method of claim 7 further comprising the step of combining at least one additional signal to noise ratio for at least one additional demodulated signal. |
