Patent ID: 8644360
Filing Date: 2014-02-04
Classification: H04B

Abstract:
1. A method for generating an ultra wide band (UWB) radio frequency pulse sequence, comprising: a) Providing a transmission time signal and information to be transmitted to a transmission processor; b) Generating, with a signal controller, 2*N+2 digital signals according to the transmission time signal and requirements about whether to transmit pulse received from the transmission processor, wherein, N is an integer with a minimum value of 1; c) Generating, with a weighted D/A converter, 2*N+1 weighted D/A, equal-delay, signals from the 2*N+2 digital signals, wherein each equal-delay signal has a polarity that is opposite to a polarity of an immediately preceding equal-delay signal and each equal-delay signal is delayed by a time delay D relative to an immediately preceding equal-delay signal; d) Carrying out, in a pulse signal generator, adjacent summation of the 2*N+1 weighted D/A, equal-delay signals, to generate, a sequence of polarity alternating pulses that constitute the UWB pulse sequence; wherein each pulse in the UWB pulse sequence has a pulse width defined between a start point and an end point, and wherein the start point is defined at a start point of a weighted D/A signal of one polarity and the end point is defined at a start of another weighted D/A signal of an opposite polarity to the one polarity, the one weighted D/A signal preceding the another weighted D/A signal by a time delay D; and e) Selecting an output polarity of each UWB pulse according to a polarity requirement of the transmitted pulse.