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Circuit and method for mapping of data symbols and reference signals for coordinated multi-point systems

A technology of reference signal and data signal, applied in multi-frequency code system, orthogonal multiplexing system, transmission system and other directions

Inactive Publication Date: 2011-05-04
TEXAS INSTR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] While previous approaches have provided steady improvements in wireless communications, the inventors have recognized that further improvements in downlink (DL) spectral efficiency are still possible

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  • Circuit and method for mapping of data symbols and reference signals for coordinated multi-point systems
  • Circuit and method for mapping of data symbols and reference signals for coordinated multi-point systems
  • Circuit and method for mapping of data symbols and reference signals for coordinated multi-point systems

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Embodiment Construction

[0016] The exemplary embodiments described herein improve communications by using distributed transmit diversity co-processing. As will be described in detail below, by receiving the same signal from different base stations (NBs), the strength of the signal received by the user equipment (UE) is improved.

[0017] refer to figure 1 , shows an example of the wireless communication system 100 of the present invention. The example communication system includes hyper cells 102 and 104 . The super cell 102 is formed by jointly processing eNB1, eNB2 and eNB3 communicating with UE1 (106). Likewise, the super cell 104 is formed by jointly processing eNB1, eNB4, eNB5 and eNB6 communicating with UE 2 (108). Each eNB of each hyper cell, such as hyper cell 102, performs sufficient common processing of the same data and transmits the data to UE1 at substantially the same time. In the discussion below, this method of co-processing is referred to as coordinated multi-point (CoMP) transmi...

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Abstract

A method of mapping data in a wireless communication system is disclosed. The method includes forming a first frame (504) having plural positions at a first transmitter (eNB 1, 200). The first frame has a first plurality of reference signals (500). A second frame (508) has plural positions corresponding to the plural positions of the first frame and is formed at a second transmitter (eNB 2, 450) that is remote from the first transmitter. The second frame has a second plurality of reference signals (506). A plurality of data signals (S1, S2) is inserted into the first frame at positions that are not occupied by either the first or second plurality of reference signals. The plurality of data signals (S1, S2) is inserted into the second frame at positions that are not occupied by either the first or second plurality of reference signals. The first and second frames are transmitted to a remote receiver (UE 1, 106).

Description

technical field [0001] The present invention relates to wireless communication systems, and more particularly, to the mapping of Physical Downlink Shared Channel (PDSCH) data and dedicated reference signals for Coordinated Multipoint (CoMP) transmission. Background technique [0002] With Orthogonal Frequency Division Multiplexing (OFDM), multiple symbols are transmitted on separate carriers to provide orthogonality. An OFDM modulator typically carries data symbols into a serial-to-parallel converter, and the output of the serial-to-parallel converter is considered frequency-domain data symbols. The frequency domain tones at both edges of the band can be set to zero and are called guard tones. These guard tones allow the OFDM signal to be fitted with a suitable spectral mask. Some frequency domain tones are set to values ​​that will be known at the receiver location. Among the signals are the Cell Specific Reference Signal (CRS) and the Dedicated or Demodulation Reference...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26H04L12/56H04J11/00
CPCH04L1/0001H04L5/0007H04L5/0023H04L5/005H04L5/0073
Inventor R·陈E·N·翁戈萨努斯Z·沈T·穆哈雷莫维奇
Owner TEXAS INSTR INC