Patent ID: 8320429

Claim:
A receiver in a human body communication system using multiple receivers, comprising: N plural reception signal electrodes attached to a plurality of spots of a human body to receive signals transmitted using the human body as a medium; N plural human body communication analog front ends (AFEs) connected respectively to the plural reception signal electrodes to remove noise of the received signals, amplify the signals, and transmit N respective signals by compensating for a timing synchronization of the receiver signals with a receiver terminal clock and frequency offset; a frequency-selective demodulator for demodulating the N signals transmitted from the plural human body communication AFEs using a frequency-selective spreading code used in a transmission side thereof; a digital signal space diversity acquisitor for outputting one signal by repeating a re-estimation procedure on all position bits in a frame of the N demodulated signals, the re-estimation procedure including: comparing identical position bits in the frame and selecting a bit value of the position bits, which are present in a large number, as a position bit value; and a data processor for performing a data processing procedure of the one outputted signal and transmitting the one processed signal to a higher layer, wherein N is a positive integer.