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Transmitters and Communication Systems

A technology of a transmitter and a mapping unit, which is applied in the field of orthogonal mask generation devices and demodulation reference signal generation devices, and can solve problems such as reducing transmission power efficiency

Inactive Publication Date: 2017-09-22
FUJITSU LTD
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Problems solved by technology

[0003] 3GPP's next-generation wireless communication system LTE (long term evolution, long-term evolution)-Advanced requires downlink to provide a peak rate of 1Gps and a peak spectral efficiency of 30bps / Hz, which brings challenges to the system's physical layer transmission scheme
If this power imbalance of each transmit antenna occurs in the entire frequency domain bandwidth, it will significantly reduce the transmit power efficiency

Method used

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  • Transmitters and Communication Systems
  • Transmitters and Communication Systems
  • Transmitters and Communication Systems

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Embodiment Construction

[0109] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, and unnecessary details and functions for the present invention will be omitted during the description to prevent confusion to the understanding of the present invention.

[0110] Figure 1A A schematic diagram of an apparatus for generating a demodulation reference signal according to an embodiment of the present invention is shown. Such as Figure 1A As shown, the demodulation reference signal generating device 100 according to an embodiment of the present invention includes a non-correlated sequence generating unit 101 , a first spreading unit 102 , a second spreading unit 103 and a mapping unit 104 .

[0111] The non-correlated sequence generation unit 101 is used to generate a pilot non-correlated sequence, which is a sequence with ideal correlation (relatively small or even 0). The non-correlated sequence here is eg Zadoff-Chu sequence or P...

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Abstract

The present invention relates to transmitters and communication systems. The transmitter includes: a non-correlated sequence generator, which generates a non-correlated sequence for demodulation reference signals used for the first resource block; a first spreading unit, which uses a first group of orthogonal masks In the sequence, the elements of the first frequency resource mapped to the first resource block are spread; the second spreading unit uses the second set of orthogonal masks to map the demodulation reference signal to the first resource in the non-correlated sequence The elements of the second frequency resource of the block are spread; the second frequency resource and the first frequency resource are adjacent frequency resources in the frequency resource elements used for demodulation reference signal transmission in the first resource block, and the second group code and The first group of codes are column mirror images of each other; and the mapping unit is used to map the spread elements to the first and second frequency resources respectively. The method and device of the present invention can increase the randomization of pilots, overcome the problem of unbalanced transmission power of pilots, and meet the orthogonality requirement of time-frequency two dimensions.

Description

[0001] This application is a divisional application of an invention patent application with an application date of January 08, 2010, an application number of 201080060993.1, and an invention title of "Orthogonal Mask Generation Device, Demodulation Reference Signal Generation Device and Method". technical field [0002] The present invention relates to the transmission technology in the wireless communication system, more specifically, relates to the orthogonal mask generation device, the demodulation reference signal generation device and the method used in the LTE / LTE-A system. Background technique [0003] 3GPP's next-generation wireless communication system LTE (long term evolution, long term evolution)-Advanced requires downlink to provide a peak rate of 1Gps and a peak spectral efficiency of 30bps / Hz, which brings challenges to the system's physical layer transmission scheme. A multiple input multiple output (MIMO) multi-antenna system can support the transmission of pa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L5/00H04L27/26H04J13/00H04J13/14
Inventor 王轶张元涛周华吴建明
Owner FUJITSU LTD