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PBCC

I'll try not to get too technical.. :)

PBCC stands for Packet Binary Convolutional Code, and is the base technology behind 802.11b+. PBCC offers many advantages over CCK (which is what 802.11b uses), while offering the ability for 802.11b+ devices to remain compatible with 802.11b devices.

CCK has a short block-length for its eight-Quadrature Phase Shift Keying (QPSK) data symbols. PBCC, on the other hand, uses 64 state symbols. This means that PBCC can carry more data.

PBCC's "Convolutional Coding" is a method of Forward Error Correction (FEC) which lowers the error rate without any need to increase transmission power. In theory, this means using PBCC, you should be able to increase your data rate while extending the distance your signal can travel without harmful degradation.

PBCC has the potential to deliver up to 33Mbps in the 2.4GHz ISM band, but its implementation in 802.11b+ only includes 22Mbps, 11Mbps and 5.5Mbps usage.

Texas Instruments currently makes all the PBCC/802.11b+ chipsets. More information can be found on the External linkTI website.


Version 2 (current) modified Tue, 03 Jul 2007 23:12:18 +1000 by tyson
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