Patent ID: 8358707

Claim:
A transmitter employing multi-coded bi-orthogonal pulse position modulation in an ultra wide band impulse communication apparatus, comprising: a serial-to-parallel converter for converting a plurality of L-bit serial data to be transmitted into parallel data by performing grouping on the L-bit serial data; a multi-coder for generating a multi-coded symbol by multiplying the parallel data by an total L orthogonal codes of length N s , wherein the generated multi-coded symbol has N s elements; a bi-orthogonal pulse position modulator for positioning the multi-coded symbol in a predetermined pulse period, and wherein the bi-orthogonal pulse modulator performs bi-orthogonal pulse position modulation on the multi-coded symbol based on the position and symmetrical characteristics of the N s elements of the multi-coded symbol in the predetermined pulse period, wherein each of the N s elements has a different value based on the plurality of L-bit serial data, wherein (L+1)/2 pulse position periods are required to perform the bi-orthogonal pulse position modulation on the value of the N s elements; and a pulse generator for multiplying an output signal of the bi-orthogonal pulse position modulator by a predetermined pulse and outputting an output signal.