PCS

PCS, Personal Communications Systems, is a name given to wireless systems that are starting to operate in the 1800 MHz frequency band. Initially the concept was that these systems would be very different than cellular; better, cheaper, simpler. However, as the date for installation has crept closer, most companies have thrown their money on upbanded cellular standards:

�PCS1900 - Upbanded GSM cellular. �TIA IS-136 - Upbanded TDMA digital cellular. �TIA IS-95 - Upbanded CDMA digital cellular. �TIA IS-88 - Upbanded NAMPS narrowband analog cellular. �TIA IS-91 - Upbanded plain old analog cellular.

A few systems are being promoted that are not based on cellular, but they have not as yet caught the PCS world on fire:

�J-STD-014 - PACS (combination of Bellcore WACS and Japan's PHS) �TIA IS-661 - Omnipoint composite CDMA/TDMA �TIA IS-665 - OKI/Interdigital Wideband CDMA

The PCS frequency allocation in the US (being followed in other countries also) is three 30MHz allocations and three 10 MHz allocations.

| � in the future �|��extra info �|� about me � |