How Does CDMA Work? CDMA allows up to 61 concurrent users in a 1.2288 MHz channel by processing each voice packet with two PN codes.
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A CDMA channel is a pair of 1.25MHz frequency bands separated by guard-band . The guard-band may be 45 or 80MHz wide. The pair of 1.25MHz band is located either in the 82-893 MHz range in case of cellular CDMA or in the 1850-1989 MHz range in case of PCS CDMA.
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