Patent ID: 8761231
Filing Date: 2014-06-24
Classification: H04B,H04L

Abstract:
1. A frequency modulating apparatus, comprising: a transmission rate controller configured to control a data transmission rate and a number of repetitive transmission times according to a communication channel environment; a data generator controlled by the transmission rate controller and configured to output serial data repetitively based on the number of repetitive transmission times; a serial-to-parallel converter configured to convert the serial data outputted from the data generator into parallel data; and a frequency selective spreader configured to select and output a frequency selective spread code corresponding to the parallel data, under the control of the transmission rate controller, wherein the transmission rate controller is configured to control the frequency selective spreader to select one of a plurality of spread code groups obtained by dividing 2 wherein the selected and outputted frequency selective spread code is selected from spread codes of the selected spread code group.