Spread Spectrum CDMA: IS-95 and IS-2000 for RF Communications
Provides a user-friendly explanation of the concepts, issues, and techniques behind the IS-95 and IS-2000 CDMA standards.
TABLE OF CONTENTS Spread Spectrum CDMA: IS-95 and IS-2000 for RF Communications
Appendix F: Channel Allocations and Standards
Overview
The following is a brief description of the RF channel allocations used in the United States for cellular and PCS two-way communications. Since AMPS was the first format deployed (in the US), the CDMA channel allocations in the cellular band are often stated in terms of AMPS channel numbers (i.e., one CDMA channel = 1.25 MHz, or 41 AMPS channels at 30kHz each). PCS spectral allotments, on the other hand, were partitioned well after the proliferation of wireless technology formats (CDMA, TDMA, GSM) in response to the dramatic increase in demand for consumer-based telecommunications spectrum. Hence these are only stated in terms of MHz.
| Cellular Band: Separation between Reverse and Forward Links = 45 MHz, | |
|---|---|
| Channel width: AMPS range: AMPS Reverse Link channel 'n': AMPS Forward Link channel n: | 30 kHz 824 MHz to 894 MHz 0.03 x n + 825.0 MHz 0.03 x n + 870.0 MHz |
| Standard CDMA channel assignments: A-side: 283, 691; B-side: 384, 777, | |
| Primary: Secondary: Primary: Secondary: | channel 283 = 878.490 F, 833.490 R channel 691 = 890.730 F, 845.730 R channel 384 = 881.520 F, 836.520 R channel 777 = 893.310 F, 848.310 R CDMA channel = 1.25 MHz (41 ch) + 18 Guard band channels (9 below + 9 above). |
| PCS band: Reverse Link Forward Link channel separation = 80 MHz | |
| Channel width: PCS range: Reverse link channel: Forward link channel: | 50 kHz 1850 MHz to 1990... |
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