Transmitter and communication system
A technology of a transmitter and a mapping unit, which is applied in the fields of demodulation reference signal generation devices and orthogonal mask generation devices, and can solve problems such as reducing transmission power efficiency
Inactive Publication Date: 2015-07-15
FUJITSU LTD
View PDF1 Cites 1 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
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
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
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...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to a transmitter and a communication system. The transmitter comprises a uncorrelated sequence generator, a first spread spectrum unit, a second spread spectrum unit and a mapping unit, wherein the uncorrelated sequence generator is used for generating uncorrelated sequences used by a demodulation reference signal of a first resource block, spread spectrum is conducted on mapped elements of the first resource block and a first frequency resource in the uncorrelated sequences used by the demodulation reference signal by using a first set of orthogonal masks, the spread spectrum is conducted on the mapped elements of the first resource block and a second frequency resource in the uncorrelated sequences used by the demodulation reference signal by using a second set of orthogonal masks, the second frequency resource and the first frequency resource are adjacent frequency resources of the first resource block and are used for demodulating frequency resource elements sent by a reference signal, a second group code serves as a row mirror image of a first group code, and the second group code serves as a row mirror image of the first group code; the mapping unit is used for mapping the spread-spectrum-conducted elements to the first frequency resource and the second frequency resource. The pilot frequency randomization can be increased, the problem that transmitting power of pilot frequency is unbalanced is overcome, and the orthogonality demand of two dimensions of time and frequency is met.
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
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): H04J13/00H04J13/14H04L5/00H04L27/26
Inventor 王轶张元涛周华吴建明
Owner FUJITSU LTD