Patent ID: 7869409
Filing Date: 2011-01-11
Classification: H04B,H04L

Abstract:
1. A communications signal transmitter for wirelessly transmitting more than one type of data packet, comprising: a media access controller for generating a structure of a data packet, for generating a serial data stream of bits representing contents of the data packet, and for generating a frame length start signal that indicates length of a frame of the data packet, wherein the media access controller simultaneously outputs the serial data stream of bits to a first portion of the transmitter and to a second portion of the transmitter, a second tapped delay line, coupled to the media access controller, for delaying the frame length start signal by the amount equal to the total group delay; and a multiplexer, coupled to the second tapped delay line, for receiving at one input the spread spectrum chips from the encoding circuit, and at another input the non-spread spectrum bits from the first tapped delay line, an output from the multiplexer being selected by a delayed frame length start signal, a value of the delayed frame length start signal being dependent upon the type of data packet.