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Single-antenna orthogonal frequency division multiplexing-based spectral domain signal transmission device and method

A signal transmission device and orthogonal frequency division technology, applied in the field of spectrum domain signal transmission device and spectrum domain signal transmission device, can solve the problem of not being able to provide space division multiple access function and space multiplexing function at the same time, to achieve The effect of reducing hardware development costs and reducing quantity requirements

Inactive Publication Date: 2013-09-11
SHANGHAI RES CENT FOR WIRELESS COMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing cyclic delay diversity technology must use a multi-antenna transmission device, which cannot provide both the space division multiple access function and the space multiplexing function

Method used

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  • Single-antenna orthogonal frequency division multiplexing-based spectral domain signal transmission device and method
  • Single-antenna orthogonal frequency division multiplexing-based spectral domain signal transmission device and method
  • Single-antenna orthogonal frequency division multiplexing-based spectral domain signal transmission device and method

Examples

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Embodiment 1

[0053] This embodiment discloses a spectrum domain signal transmission device based on single-antenna OFDM, wherein the spectrum domain signal transmission device is embedded with a spectrum domain communication signal transmission device based on single antenna OFDM A processing unit, the spectral domain communication signal transmission processing unit based on single-antenna OFDM includes an inverse Fourier transform unit, N T A power allocation unit connected in parallel, a cyclic shift processing unit, an adder, and a cyclic prefix unit; the inverse Fourier transform unit is used to convert the input frequency domain signal into a time domain signal; the N T A power allocation unit connected in parallel is used to perform power allocation on the time-domain signal; the cyclic shift processing unit includes N T parallel cyclic shift units, N T cyclic shift unit according to the principle of one-to-one correspondence to the N T The output signals of power distribution uni...

Embodiment 2

[0071] This embodiment provides a device for generating an OFDM signal based on a single antenna, wherein circular autocorrelation functions of the OFDM signal are linearly independent from each other. The OFDM signals whose cyclic autocorrelation functions are linearly independent can be applied to spectral domain channel multiplexing transmission systems based on cyclic delay modulation and spectral division multiple access systems based on cyclic delay vectors. The core of the single-antenna generating device for generating OFDM signals whose cyclic autocorrelation functions are linearly independent includes a spectral domain communication signal transmission processing unit based on single-antenna OFDM.

[0072] Such as figure 1 As shown, the spectral domain communication signal transmission processing unit based on single-antenna OFDM multiplexing sequentially includes an inverse Fourier transform unit, N T A power allocation unit connected in parallel, a cyclic shift pr...

Embodiment 3

[0081] This example provides a single-antenna transmitting device of a spectral domain channel multiplexing transmission system based on cyclic delay modulation, such as Figure 4 shown. A cyclic delay modulation module, a single-antenna cyclic delay diversity OFDM transmission module, and a serial / parallel processing module are embedded in the transmitting device; the serial / parallel processing module is connected with the cyclic delay modulation module and the single antenna respectively The cyclic delay diversity OFDM transmitting module is connected, and the cyclic delay modulation module is also connected with the single-antenna cyclic delay diversity OFDM transmitting module.

[0082] The cyclic delay modulation module is used to map the information bit stream into a cyclic delay modulation vector; the single-antenna cyclic delay diversity OFDM transmitting module is used to convert the information bit stream into an orthogonal amplitude modulation symbol, and then accor...

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Abstract

The invention discloses a single-antenna orthogonal frequency division multiplexing-based spectral domain signal transmission device and a single-antenna orthogonal frequency division multiplexing-based spectral domain signal transmission method. A transmission processing unit is embedded in the device, and comprises an inverse Fourier transform unit, NT shunt-wound power allocation units, a cyclic displacement processing unit, an adder and a cyclic prefix unit, wherein the power allocation units are used for performing power allocation on signals; the cyclic displacement processing unit comprises NT parallel cyclic displacement units, and performs displacement processing on the output signals of the NT power allocation units according to the principle of one-to-one correspondence to obtain NT displacement signals; the adder is used for accumulating the NT displacement signals to obtain a summation signal; and the cyclic prefix unit is used for attaching a cyclic prefix to the summation signal, and feeding the summation signal attached with the cyclic prefix into a single transmission antenna for transmission. The single-antenna device regulates and controls an orthogonal frequency division multiplexing signal cyclic autocorrelation function by a cyclic delay vector, reduces the requirements of the transmission device on the number of radio frequency antenna modules, and reduces the hardware development cost.

Description

technical field [0001] The invention belongs to the technical field of communication, and relates to a transmission device of a spectrum domain signal, in particular to a transmission device and a transmission method of a spectrum domain signal based on single-antenna orthogonal frequency division multiplexing. Background technique [0002] As a multi-antenna diversity technology with good standard compatibility, cyclic delay diversity (Cyclic Delay Diversity, CDD) has greatly enhanced the existing standard Orthogonal Frequency Division Multiplexing (OFDM) technology, making it possible in Enough space diversity gain can be obtained in the wireless environment with rich scattering. Cyclic delay processing can convert space diversity into frequency diversity, thus adding redundancy in the frequency domain of OFDM systems. Different from Space-Time Block Coding (STBC) and Space-Time Trellis Codes (STTC), the cyclic delay diversity technology can only be realized at the sendin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26H04L1/06H04B7/06
Inventor 郭海友蒋永磊胡宏林
Owner SHANGHAI RES CENT FOR WIRELESS COMM
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