Space-time continuous phase modulation (CPM) signal modulation and demodulation methods

A modulation method and signal technology, applied in the field of communication, can solve problems such as high computational complexity and increased computational complexity
CN102202024AInactive Publication Date: 2011-09-28UNIV OF ELECTRONIC SCI & TECH OF CHINA
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
UNIV OF ELECTRONIC SCI & TECH OF CHINA
Publication Date
2011-09-28
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a space-time continuous phase modulation (CPM) signal modulation method and a space-time CPM signal demodulation method. By the space-time CPM signal modulation method for preprocessing a CPM signal before modulation, a receiver can demodulate the received CPM signal in a linear signal demodulation way to reduce the demodulation complexity. Before CPM modulation is performed on a transmission sequence, the preprocessing before the modulation is performed at first, and comprises a segmented mapping step, an intra-segment redundancy addition step, a primary precoding step, an intra-segment redundancy regulation step, a time reversal and negation step, a secondary precoding step, a cyclic prefix addition step, an intra-segment redundancy addition step and a space-time signal formation step. In the methods, a transmitter adds cyclic prefixes to the sequence, and a signal received by the receiver is the cyclic convolution of a transmitted signal and a channel; therefore, when receiving the modulated CPM signal, the receiver can demodulate the CPM signal in the linear signal demodulation way.
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Description

technical field

[0001] The invention belongs to the technical field of communication, in particular to a continuous phase modulation system using multiple antennas (MIMO). Background technique

[0002] Continuous phase modulation (continuous phase modulation, CPM) has high power and bandwidth efficiency, and has received extensive attention in power and bandwidth limited systems. Its constant envelope characteristic enables it to be amplified by an inexpensive nonlinear amplifier, and there is no high PAPR problem of linear modulation in high-order modulation. These excellent characteristics make the CPM signal have broad application prospects in digital communication, and become one of the main candidate technologies for future mobile multimedia communication.

[0003] The power normalized CPM signal s(t) can be expressed as:

[0004]

[0005]

[0006] Represents the time-varying phase carrying information, where h=h m / h n is the modulation index (modulation fa...

Claims

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