Patent ID: 8787514

Claim:
An apparatus for generating a pseudo noise (PN) code, the apparatus comprising: a memory device unit including a plurality of memory devices; an exclusive-OR (XOR) operation unit receiving output values of at least two memory devices among output values of the plurality of memory devices to output an XOR operation value with respect to the received output values; and a PN code generation unit generating the PN code based on an output value of the XOR operation unit, wherein: the plurality of memory devices is cascaded, and the apparatus further comprises: an initial value storage unit storing an initial value of each of the memory devices; and an AND operation unit outputting an AND operation value with respect to the initial value of each of the memory devices and an output value of a memory device that is positioned in a final end among the plurality of cascaded memory devices, and a memory device that is positioned in a front end among the plurality of cascaded memory devices receives an output value of the AND operation unit with respect to the initial value of the memory device of the front end.