Patent ID: 6606351
Filing Date: 2003-08-12
Classification: G06F,H03M,H04B,H04H,H04J,H04K,H04L,H04M,H04N,H04W,Y02D

Abstract:
A method of polyphase filtering in a multi-point to point communication system, comprising:receiving a plurality of modulated orthogonal carriers in a frequency bandwidth having at least telephony information modulated thereon; and polyphase filtering sets of the plurality of modulated orthogonal carriers to provide ingress protection for the modulated orthogonal carriers; wherein polyphase filter sets of the plurality of modulated orthogonal carriers comprises: filtering and passing a first plurality of channel sets of the modulated orthogonal carriers with a first polyphase filter; passing, with the first polyphase filter, a first plurality of channels of each channel set of the first plurality of channel sets; filtering and passing a second plurality of channel sets of the modulated orthogonal carriers with a second polyphase filter; passing, with the second polyphase filter, a second plurality of channels of each channel set of the second plurality of channel sets; and wherein the second plurality of channels passed include channels of the first plurality of channel sets not passed when filtering the first plurality of channel sets.