公开(公告)号：EP1552626A2

公开(公告)日：2005-07-13

申请号：EP03756912.6

申请日：2003-10-06

申请人： IPR Licensing, Inc.

发明人： JOHNSON, Kevin, P. ,  ROUPHAEL, Antoine, J. ,  NELSON, George, Rodney, Jr.

IPC分类号： H04B7/212

CPC分类号： H04L1/0045 ,  H04L1/004 ,  H04L1/0041 ,  H04L2001/0093 ,  H04W28/06 ,  H04W72/0413 ,  H04W72/0446 ,  H04W74/004 ,  H04W74/006

摘要： A technique for a time division multiplex system in which access to shared broadcast communication media is granted on a demand basis. Particular connections are assigned slot times at the transmitter based on demand. However, no specific information regarding the assignment of time slots need be communicated to the receivers. The transmit side employs a forward error correction technique followed by multiplication by a cover sequence unique to each connection. All receivers listen to the broadcast transmission channel all of the time. The receiver assigned to each connection decodes the data associated with that connection. Data frames that fail the forward error correction process are discarded, and only those frames which are successfully decoded are passed up to a higher layer.

公开(公告)号：EP1269646B1

公开(公告)日：2006-04-12

申请号：EP01911096.4

申请日：2001-02-23

申请人： IPR Licensing Inc.

发明人： ROUPHAEL, Antoine, J. ,  HOFFMANN, John, E. ,  NELSON, George, Rodney, Jr. ,  PATEL, Samir, K. ,  PROCTOR, James, A., Jr. ,  RILEY, Daniel L.

IPC分类号： H04B1/707

CPC分类号： H04B1/707 ,  H04B1/7105 ,  H04B1/712 ,  H04B2201/70703 ,  H04B2201/70705 ,  H04B2201/7071

摘要： A single, common correlation filter (CF) core is provided in a wireless system using CDMA (code division multiple access). A plurality of channels with different data rates are provided in the wireless system. The channels provided in the wireless system include the access channel, the maintenance channel, and the traffic channel in which information (e.g., pilot or data symbols or both) is transmitted at the tier 1 (which is the basic despreading rate), tier 2 and tier 3 rates. The data rate for transmitting the information is programmable by an external programmable processor, e.g., a digital signal processor (DSP). A user-unique code, such as a PN (pseudo-random noise) code, is applied to the information being transmitted in the channels of the wireless system. Theinformation is modulated and transmitted in any one of the channels at any data rate. The transmitted information is correlated at the basic despreading rate (i.e., the tier 1 rate) in the correlation filter (CF) of the wireless system by time multiplexing delayed versions of the PN code (or orthogonal code, Walsh code) to the correlation filter core. The correlated information is then demultiplexed and demodulated. The demodulated information is summed at the proper integer multiple of the tier 1 rate to achieve the tier 2 and tier 3 rates. One or more signal components are selected (in terms of the received power, signal-to-noise ratio or multipath width) in a window or time period for optimal information recovery. The selecting step can also be implemented according to a preprogrammed time alignment. Furthermore, outputs from the demodulated information can be provided and combined for temporal diversity. Spatial diversity is achieved by providing a plurality of antennas, and a plurality of receivers at a location and providing a single, common correlation filter at each of the plurality of antennas of the receivers in the wireless system.

公开(公告)号：EP1547199A2

公开(公告)日：2005-06-29

申请号：EP03759310.0

申请日：2003-09-17

申请人： IPR Licensing, Inc.

发明人： CHIANG, Bing ,  GAINEY, Kenneth, M. ,  PROCTOR, James, A., Jr. ,  ROUPHAEL, Antoine, J. ,  GOTHARD, Griffin, K. ,  LYNCH, Michael, J.

IPC分类号： H01Q19/00 ,  H01Q19/10

CPC分类号： H01Q3/2641 ,  H01Q1/22 ,  H01Q1/2258 ,  H01Q9/16 ,  H01Q19/26 ,  H01Q19/32 ,  H01Q21/08 ,  H01Q21/20 ,  H01Q21/29

摘要： An antenna assembly includes at least two active or main radiating omni-directional antenna elements (100-1, 100-2) arranged with at least one beam control or passive antenna element (115) used as a reflector (305). The beam control antenna element(s) (115) may have multiple reactance elements (150-1, 150-2) that can electrically terminate it to adjust the input or output beam pattern(s) (180, 190) produced by the combination of the active antenna elements (100-1, 100-2) and the beam control antenna element(s) (115). More specifically, the beam control antenna element(s) (115) may be coupled to different terminating reactances (150-1, 150-2) to change beam characteristics, such as the directivity and angular beamwidth. Processing may be employed to select which terminating reactance to use.