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Multiple-carrier transmission device and multiple-carrier transmission method

A transmission method and a technology of a transmitter, which are applied in the direction of multiple use of transmission paths, transmission systems, digital transmission systems, etc., can solve the problems that the influence of interference on the indication channel is not considered, and the characteristics of signal transmission are dependent, etc.

Inactive Publication Date: 2003-12-10
NTT DOCOMO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0015] However, a problem with the traditional construction of indicator channels is that the interference effect between the multiplexed indicator channels on the radio frame is not considered
[0016] A problem with the conventional methods of spreading data symbols in at least one of the time base or subcarrier is that the quality of the signal transmission characteristics of each method is highly dependent on the conditions of the propagation path

Method used

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  • Multiple-carrier transmission device and multiple-carrier transmission method
  • Multiple-carrier transmission device and multiple-carrier transmission method
  • Multiple-carrier transmission device and multiple-carrier transmission method

Examples

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no. 1 example

[0051] The first embodiment of the present invention refers to Figure 4 to Figure 5 will be described.

[0052] Except that the indicator symbol setting unit 17 in the method of the present invention sets the indicator symbol image, the structure of the transmitter of the multi-carrier transmission according to the first embodiment is the same as that of the multi-carrier transmission in the prior art shown in FIGS. 1 to 2 Transmitters are the same.

[0053] Such as Figure 4 As shown, the transmitter of the multicarrier transmission according to the first embodiment transmits a radio frame including at least one indicating symbol period within a plurality of subcarriers #1 to #8.

[0054] In the specification, "pointer" refers to 1-bit information having "+1" or "-1", and "pointer image" refers to information composed of a plurality of pointers. Such as Figure 5 As shown, for example, the pointer images include pointer images #1 "+1, +1+1, +1, +1, +1, +1, +1" and so on....

no. 3 example

[0077] The third embodiment of the present invention refers to the appended Figure 8 will be described. The configuration of the transmitter for multi-carrier transmission according to the third embodiment is the same as that of the transmitter for multi-carrier transmission of the first embodiment.

[0078] Such as Figure 8 As shown, the indicator allocation unit 17 of the transmitter for multi-carrier transmission according to the third embodiment puts Figure 5 The shown indicator images #1 to #8 are assigned to any given portion of the indicator period of at least two of the subcarriers #1 to #6.

[0079] exist Figure 8 , indicating that the symbol allocation unit 17 puts Figure 5 The shown indicator images #1 to #8 are allocated to indicator periods of a predetermined number (for example, two) of adjacent subcarriers.

[0080] Pointer images #1 to #8 assigned to the same sections #A and #B are orthogonal to each other.

[0081] The part #A is composed of indicat...

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Abstract

The object of the present invention is to provide a transmitter for multi-carrier transmission and multi-carriertransmitting method for allocating pilot channels to radio frames, in consideration of interference with other pilot channels. The present invention relates to the transmitter for multi-carrier transmission configured to transmit a plurality of sub-carriers having at least one pilot symbol duration. The transmitter according to the present invention comprises a pilot symbol allocater configured to allocate a plurality of pilot symbol patterns which are orthogonal to each other, to the at least one pilot symbol durations in at least two sub-carriers.

Description

technical field [0001] The present invention relates to a transmitter for multi-carrier transmission and a multi-carrier transmission method. Background technique [0002] In recent years, radio transmission systems using multi-carrier transmission have been intensively studied. [0003] For example, "IEEE802.11a", which is a LAN as a radio standard, defines a radio transmission system using OFDM (Orthogonal Frequency Division Multiplexing). [0004] Radio access systems such as MC / DS-CDMA (Multi-Carrier / Direct Sequence-Code Division Multiple Access) and MC-CDMA (Multi-Carrier-Code Division Multiple Access) are intended to be used as multi-carrier with CDMA (Code Division Multiple Access) Transmission radio transmission system. [0005] As shown in Figure 1, the spreading code multiplexing system 13 1 The data symbols to 13n are spread using spreading codes, and multiple DS-CDMA signals are transmitted in parallel on subcarriers within MC / DS-CDMA by configuring (convertin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/707H04J11/00H04J13/20H04L1/00H04L5/02H04L27/26H04W72/54
CPCH04L5/006H04L5/0016H04L5/0048H04J13/18
Inventor 新博行安部田贞行前田规行佐和桥卫
Owner NTT DOCOMO INC
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