Title :
Investigation of error control properties of orthogonal codes
Author_Institution :
Dept. of Electr. Eng., North Dakota Univ., Grand Forks, ND, USA
Abstract :
In this paper we investigate the distance properties of orthogonal codes and evaluate its error control properties. We examine this by noting that an n-bit orthogonal code has n/2 1´s and n/2 0´s; i.e., there are n/2 positions where 1´s and 0´s differ. Therefore, the distance between two orthogonal codes is also n/2. By exploiting this distance property, we show that a code rate r=k/n, where n is the code length and k is the data length, is available out of orthogonal codes with error control capabilities. We then develop a method of coded modulation with bandwidth efficiency. The proposed technique offers a simpler solution to error control coding with bandwidth efficiency. Finally, the construction of an orthogonal coded modulation scheme is presented to illustrate the concept.
Keywords :
error correction codes; modulation coding; bandwidth efficiency; code length; code rate; coded modulation; data length; distance properties; error control coding; orthogonal codes; Bandwidth; Block codes; Error correction; Gain measurement; Modular construction; Modulation coding; Neodymium; Read only memory; Semiconductor device measurement; Table lookup;
Conference_Titel :
Military Communications Conference, 2003. MILCOM '03. 2003 IEEE
Print_ISBN :
0-7803-8140-8
DOI :
10.1109/MILCOM.2003.1290213