digital modulation, ask, q-ask

2011 6 26
1 个回答
6 次查看（30 天）

0 个投票

hello friends, i have [0 0 0 1 1 0 1 1] bit sequence.
i want to create q-ask modulation scheme like being showed in
http://imageshack.us/photo/my-images/683/qask.jpg/
please help me

请先登录，再回答此问题。

回答（1 个）

Rick Rosson
Rick Rosson 2011-6-26

0 个投票

Please try the following:
  1. Convert the binary sequence to a sequence of symbols with values 0,1,2, or 3.
  2. Map the sequence of symbols to a sequence of amplitude levels -3,-1, +1, +3.
  3. Multiply the sequence of amplitude levels by a sine or cosine wave at the appropriate carrier frequency.
  4. Plot all of the results versus time.
HTH.
Rick

类别

在 帮助中心 和 File Exchange 中查找有关 Modulation 的更多信息

产品

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by