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 Analysis of PN CODE in Spread Spectrum Communication Systems PERFORMANCE EVALUATION OF PSEUDO-CODE IN MULTI-USER ENVIRONMENT.
Наименование:

Analysis of PN CODE in Spread Spectrum Communication Systems PERFORMANCE EVALUATION OF PSEUDO-CODE IN MULTI-USER ENVIRONMENT.

автор Afsana A. издательство Книга по Требованию Организация здравоохранения
Cтраниц 92        мягкая обложка       
Аннотация:The Walsh-Hadamard code has the best cross correlation properties but it lacks self-synchronization feature. It has been seen that the length of the code, autocorrelation and cross correlation properties can be used to determine the best suitable code for any particular communication environment. Finally the barker codes were analyzed. It was also tried to find out those codes in 64 Walsh-Hadamard codes which have best auto correlation properties. At first, the best codes in 31 bit codewords which have the best auto-correlation properties were discovered. This book basically deals with the pseudo codes used in spread spectrum communication system. The barker code has good auto- correlation properties and the pair with the low cross correlation was discovered so that they can be used in multi-user CDMA environment. It was assumed only the bipolar case. This includes the various types of pn codes and their techniques, benefits and shortcomings and as well as their properties. Therefore, the code with suitable autocorrelation properties along with low cross correlation values was tried to find out. Then the work was concentrate on Walsh-Hadamard code.
Автор: Afsana A.
Издательство: Книга по Требованию
Год:2010
Цена:
2007 руб
Нет в наличии
Поиск: Analysis of PN CODE in Spread Spectrum Communication Systems PERFORMANCE EVALUATION OF PSEUDO-CODE IN MULTI-USER ENVIRONMENT.



Централизованная обработка исключений

Код ее почти не отличается от предложенного ранее. Единственным изменением является переменная, в которой сохраняется адрес предыдущего обработчика. s a ic i myHa dler(PEXCEP IO RECORD pEhRecors, PEXCEP IO REGIS RA IO pEhRegRecord, PCO EX pCo ex , PEXCEP IO RECORD pp); - это наш обработчик, который будет вызван в случае возникновения необработанного исключения. i pEhRecors,  PEXCEP IO REGIS RA IO pEhRegRecord, PCO EX pCo ex , void pp) {  pri f(" I My Ha dler ");  pri f("Excep io address: 0x%X ", pEhRecors->Excep io Address);  pri f("Excep io code: 0x%X ", pEhRecors->Excep io Code);  re ur pEhRegRecord, pCo ex , pp); } В программе создается статический объект типа Ca U ha dledExcep io Fil er. Во время создания этого объекта в конструкторе вызывается функция подмены самого верхнего обработчика исключений. После того, как статические объекты приложения созданы, ru ime передает управление функции mai , в которой генерируется исключение по доступу к памяти, в результате чего управление переходит нашему обработчику исключения, который сейчас не делает ничего, а просто выводит информацию об исключении на экран и передает управление подмененному обработчику.
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