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Resource distributing method and apparatus of dynamic time-frequency and code sequence

A technology of resource allocation and time-frequency resources, applied in multiplexing code allocation, multi-frequency code system, electrical components, etc., can solve problems affecting system performance, deep fading of TFB blocks, etc.

Inactive Publication Date: 2006-05-17
BEIJING SAMSUNG TELECOM R&D CENT +1
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  • Abstract
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  • Application Information

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Problems solved by technology

The advantage of this allocation method is that the resource allocation method is simple, and the disadvantage is that some TFB blocks that make up the channel may encounter deep fading, thus affecting system performance

Method used

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  • Resource distributing method and apparatus of dynamic time-frequency and code sequence
  • Resource distributing method and apparatus of dynamic time-frequency and code sequence
  • Resource distributing method and apparatus of dynamic time-frequency and code sequence

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Embodiment

[0046] Figure 5 The spreading factor SF is 8, the number of TFB subcarriers is 4, and the example of dynamic time-frequency resource and sequence allocation. Assume that two channels have occupied TFB block A in OFDM symbol 1 and TFB block D in OFDM symbol 2 respectively, and the two channels have respectively occupied TFB block B in OFDM symbol 1 and OFDM symbol 2 The TFB block E of the other two channels also occupy the TFB block C in OFDM symbol 1 and the TFB block F in OFDM symbol 2 respectively. Figure 5 The existing sequence assignments in TFB blocks A, B, F are further shown in . Assume that in the process of dynamic time-frequency resource allocation, TFB blocks A and B in OFDM symbol 1 and TFB block F in OFDM symbol 2 meet the requirements. See Tables 2 and 3 for the code sequence selection process. Wherein, Table 2 lists the results of allocation of TFB blocks and code sequences obtained according to formula (5) under ideal equalization conditions. The optional...

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Abstract

A resource distribution method of dynamic time frequency and code sequence includes searching suitable time frequency resource block as per channel quality, finalizing time frequency resource distribution to channel; finalizing code sequence distribution according to distributed code sequence information in time frequency resource block.

Description

technical field [0001] The invention relates to resource allocation technology, in particular to a dynamic channel allocation method and device including time-frequency resources and sequence resources in an OFDM-CDMA multiple access system. Background technique [0002] Code Division Multiplexing (CDMA) is an advanced wireless spread spectrum communication technology used in digital cellular mobile communication in recent years. The code division multiplexing (CDMA) system adopts direct sequence spread spectrum (DS-SS) to overcome frequency selective fading in the channel, but its capacity is limited by multiple access interference (MAI for short), and MAI comes from incomplete spreading Autocorrelation and cross-correlation properties of frequency codes. A method to suppress inter-chip interference in frequency-selective fading channels is to combine CDMA technology with multi-carrier modulation, such as Orthogonal Frequency Division Multiplexing (OFDM) technology, to for...

Claims

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Application Information

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IPC IPC(8): H04J11/00H04J13/16H04L27/26
Inventor 廖敬一王海赵英权
Owner BEIJING SAMSUNG TELECOM R&D CENT
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