Method and apparatus for broadcasting and receiving system information in ofdma systems

An orthogonal frequency division multiple access and system information technology, applied in the field of broadcast channel design, can solve the problems of degraded data signal decoding performance, poor channel estimation, etc.

Inactive Publication Date: 2010-12-29
HFI INNOVATION INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This is because the collision of the pilot signals leads to poor channel estimation

Method used

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  • Method and apparatus for broadcasting and receiving system information in ofdma systems
  • Method and apparatus for broadcasting and receiving system information in ofdma systems
  • Method and apparatus for broadcasting and receiving system information in ofdma systems

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Embodiment Construction

[0023] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0024] figure 1 is a schematic diagram of the BCH in the wireless OFDMA system 10 according to an embodiment of the present invention. Wireless OFDMA system 10 includes MS 11 , serving BS 12 and two interfering BSs 21 and 22 . The MS 11 includes a storage device (storage device) 14, a processor (processor) 15, a first transmitter and receiver (transmitter and receiver) 16 coupled to a first antenna (antenna) 18, and a second antenna coupled to 19 of the second transmitter and receiver 17 . Similarly, the BS 12 includes a memory device 24 , a processor 25 , a first transmitter and receiver 26 coupled to a first antenna 28 , and a second transmitter and receiver 27 coupled to a second antenna 29 . In the wireless OFDMA system 10, each of BS 12, BS 21 and BS 22 broadcasts a set of basic system information to all MSs allocated in the wireless OFDM...

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PUM

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Abstract

A method for broadcasting system information via a broadcast channel (BCH) in an OFDMA system is provided. The BCH comprises one or more two-dimensional resource blocks. A plurality of pilot tones and a plurality of data tones are positioned within each resource block. The system information is mapped onto the plurality of data tones. In one embodiment, the plurality of pilot tones are located in configurable positions such that pilot tones of the same resource blocks transmitted by different base stations in the OFDMA system are interlaced to reduce pilot-to-pilot collision. In another embodiment, data tones that are located in pilot positions of other adjacent cells are nullified to reduce data-to-pilot collision. In one novel aspect, the property of interlaced pilot patterns and tone nullification is leveraged to estimate interference second-order statistics, which facilitates receiver implementation and improves receiver performance.

Description

[0001] Cross References to Related Applications [0002] This application claims priority under 35 U.S.C. §119 to U.S. Provisional Application No. 61 / 156,576, filed 3 / 2 / 2009, entitled "OFDMA System," and 61 / 172,326, filed 2009 / 4 / 24, US provisional application titled "Receiver Architecture for OFDMANetwork with FR=1". The subject matter of which is hereby incorporated by reference. technical field [0003] Embodiments of the present invention relate to wireless network communications, and in particular to broadcast channel design in wireless OFDMA communication systems. Background technique [0004] In a cellular wireless Orthogonal Frequency Division Multiple Access (hereinafter referred to as OFDMA) communication system, each base station (hereinafter referred to as BS) broadcasts a set of essential system information to mobile stations (hereinafter referred to as MS). Information, such as cell identification (IDentification, hereinafter referred to as ID) information, ...

Claims

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Application Information

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IPC IPC(8): H04L27/26H04W88/00
CPCH04L5/0007H04W48/12H04L25/0232H04L5/0035H04L5/005H04W72/082H04L5/0073H04W72/541
Inventor 陈义升廖培凯林志远
Owner HFI INNOVATION INC
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