Patent ID: 8391253
Filing Date: 2013-03-05
Classification: H04B,H04J,H04W

Abstract:
1. A method for transmitting a broadcast/multicast signal in a mobile communications network from a base station operating in a Single Frequency Network (SFN) that includes one or more other base stations transmitting the broadcast/multicast signal, the method comprising: obtaining a first pilot symbol sequence for each slot of one or more frames of the broadcast/multicast signal, so that the first pilot symbol sequence varies for each slot of a given frame; spreading the first pilot symbol sequence for each slot with a channelization code that is orthogonal with respect to another channelization code used to spread a second pilot symbol sequence; scrambling the spread first and second pilot symbol sequences for each slot, using a scrambling code that is common to the SFN, to form first and second pilot channel signals, respectively; and transmitting the second pilot signal as a common pilot channel signal that is transmitted during all slots of the one or more frames, and transmitting the first pilot channel signal as a Time Division Multiplex (TDM) pilot signal by multiplexing it in time with one or more traffic channel signals transmitted as part of the broadcast/multicast signal during each slot.