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Mobie station receiver capable of using for single carrier and multiple carrier receiving operation

A multi-carrier receiving and single-carrier technology, applied in the modulation carrier system, communication between multiple stations, modulation transfer, etc., can solve the problem that there is no one that can show the required properties

Inactive Publication Date: 2002-10-09
NOKIA MOBILE PHONES LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] One thing to keep in mind is that none of these conventional approaches exhibit the desired property of providing a high degree of coordination with a single-carrier receiver architecture

Method used

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  • Mobie station receiver capable of using for single carrier and multiple carrier receiving operation
  • Mobie station receiver capable of using for single carrier and multiple carrier receiving operation
  • Mobie station receiver capable of using for single carrier and multiple carrier receiving operation

Examples

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Embodiment Construction

[0035] First refer to figure 1 , which illustrates a simplified block diagram of an embodiment of a wireless communication system 5 suitable for practicing the present invention. The wireless communication system 5 includes at least one mobile station (MS) 100 . figure 1 Also shown is an exemplary network operator having, for example: a GPRS Support Node (GSN) for connecting to a telecommunications network such as a public packet data network or PDN; at least one base station controller (BSC) 40; and multiple A base transceiver station (BTS) 50 transmits both physical and logical channels to the mobile station 100 in the forward or downlink direction according to a predetermined air interface standard. There is also a reverse or upstream communication path from the mobile station 100 to the network operator, which carries mobile-originated access requests and traffic. To illustrate the present invention, it is assumed that BTS 50 has multi-carrier transmission capability.

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Abstract

Follow the steps below for single-carrier and multi-carrier reception: Downconvert the received RF signal to I and Q channel signals, each of which consists of multiple subcarriers with low IF, one subcarrier or a single carrier at 0 Hz if desired center; use analog low-pass filters to filter out-of-band interfering signals of interest in the I and Q channels; convert the I and Q channel signals to their digital representations; The numbers represent quadrature downmixing to baseband in the digital domain, separating the subcarriers as mirror images of each other; the resulting I and Q signals are added or subtracted digitally to obtain the upper and lower sidebands containing the desired subcarriers one or both. In symmetrical multi-carrier reception, the down-conversion step includes the step of tuning the local oscillator to the center frequency of a set of subcarriers. In asymmetric multi-carrier reception, however, the down-conversion step involves tuning the local oscillator between the center subcarrier and its interfering adjacent channel.

Description

technical field [0001] The present invention relates generally to wireless communication systems and methods, and more particularly to RF receivers capable of receiving multiple carrier frequencies (multi-carrier). Background technique [0002] Modern wireless telecommunication systems are evolving to provide high speed packet data services to users of mobile devices. One example is the ability to provide Internet access to users of mobile devices. One wireless system that is rapidly moving in this direction is the Time Division Multiple Access (TDMA) system known as Global System for Mobile Communications (GSM), specifically the enhanced version of GSM known as GSM+, GPRS (General Packet Radio Service) and EGPRS (Enhanced general packet radio service). [0003] With the development of such modern wireless telecommunication systems, user demands for higher speed data connections will inevitably increase. One particularly attractive technique for increasing the effective d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/227H03D3/00H03D7/16H04J1/00H04L5/06
CPCH03D3/009H03D7/166H04L5/06
Inventor S·哈尔波亚M·哈马莱宁
Owner NOKIA MOBILE PHONES LTD