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METHOD AND APPARATUS FOR REFERENCE SYMBOL RECEPTION

  • US 20150318969A1
  • Filed: 01/17/2014
  • Published: 11/05/2015
  • Est. Priority Date: 01/31/2013
  • Status: Active Grant
First Claim
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1. A method of receiving data at a communications device from a wireless communications network, the method comprising:

  • receiving data symbols transmitted from the wireless communications network at the communications device via a wireless access interface, the wireless access interface providing a plurality of communications resource elements across a system bandwidth, which are divided in time into a plurality of time divided radio frames,the wireless access interface providing within the system bandwidth, a first section of communications resource elements within a first frequency bandwidth for allocation preferably to reduced capability communications devices to receive signals representing the data transmitted by the infrastructure equipment within the first frequency bandwidth forming a virtual carrier, the reduced capability communications devices each having a receiver bandwidth which is greater than or equal to the first frequency bandwidth but less than the system bandwidth,wherein receiving the data symbols comprisesreceiving the data symbols from a first subset of resource elements in one or more of the radio frames, andreceiving common reference symbols from a second subset of resource elements in each radio frame, the common reference symbols having been transmitted with a first transmission power and the data symbols having been transmitted via the virtual carrier with a second transmission power, and wherein the method further comprisesreceiving specific reference symbols which have been transmitted via the resource elements of said virtual carrier at the second transmission power;

    determining a difference in power between the second transmission power and the first transmission power, andif the difference in power substantially exceeds a threshold, generating channel estimates using only the specific reference symbols received from the virtual carrier.

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