Abstract: The present invention relates to a demodulation method for enhancing decoding performance of information bits in a constant-amplitude multi-code biorthogonal modulation communication system, which performs encoding to cause the level of a transmission symbol to be constant. In the demodulation method of the present invention, a demodulator demodulates the received signal, the demodulator having four blocks. C (c?2k, k is the number of information bits) bit streams with higher correlation values in descending order are selected and combined among demodulated bit streams to establish c4 bit stream candidates. A parity check is performed with respect to the c4 bit stream candidates, a candidate group having a maximal sum of correlation values is selected among candidate groups in which any error is not generated at the parity check. A bit stream corresponding to the selected candidate group is determined to be an output of a receiver.

Abstract: A refrigerator including an improved lower cover. The refrigerator comprises a main body having a storage compartment defined therein, and a lower cover mounted to the lower end of the front part of the main body such that the front part of the lower cover and the front part of the main body together form the same plane, wherein the lower cover is provided with an engaging member bent from the upper end of the lower cover toward the rear of the main body while being extended a prescribed length, the engaging member being successively formed in the lateral direction thereof, and wherein the main body is provided at the bottom part thereof with an engaging groove corresponding to the engaging member of the lower cover, the engaging member of the lower cover being engaged with the engaging groove of the main body.