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انجام پروژه های مهندسی برق - چندی کردن ( Quantizing )
چندی کردن ( Quantizing )
چهارشنبه 12 مهر 1391 ساعت 11:36 ب.ظ | نوشته ‌شده به دست رسول نیک بخت | ( نظرات )

      سیگنال های پیام از قبیل شکل موج های صحبت یا شکل موج های تصویر دارای دامنه پیوسته بوده و در نتیجه نمونه های آنها نیز در دامنه پیوسته خواهند بود. هنگامی که این نمونه های با دامنه پیوسته توسط یک کانال با اغتشاش ارسال می گردند، گیرنده نمیتواند اندازه های دقیق دنباله ارسالی را آشکارسازی کند.
اثر اغتشاش در سیستم را می توان با نمایش نمونه ها توسط تعدادی محدود سطوح از پیش تعیین شده و ارسال این سطوح توسط شماهای مدولاسیون گسسته از قبیل PAM گسسته به حداقل رسانید.



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