====== SC Wireless ====== ===== US20070060167-A1 ===== GSM EDGE RAN ===== US20060171347-A1 ===== cdma2000 1xEV-DO ===== US20070270170-A1 ===== HSDPA ===== EP1084587-B1 ===== * DE69929050(T2).pdf * EP1084587(B1).pdf Fast acquisition of traffic channels for a highly variable data James Proctor may 1999 Tantivy Communications The author proposes a dynamic subchannel allocation scheme in a CDMA network, in order to accommodate a variable data rate. A low-cost signaling scheme that ensures the functioning of the allocation is addressed as well. ===== EP1564908-A1 ===== * EP1564908(A1).pdf * EP1714518(B1).pdf * US20070054621(A1).pdf * WO2005064975(A1).pdf Advanced multi-sensor processing Peter Larsson dec 2003 Ericsson In this document, an uplink receiver cooperation scheme is proposed. Multiple destinations transmit their own received signal, a superposition signal from multiple sources, to a central unit via a high speed reliable link. The central unit then performs a joint detection for the multiple source messages. The decoded messages are sent back to the corresponding destination. ===== EP1610486-A3 (already reviewed) ===== * EP1610486(A2,A3).pdf * US20050286621(A1).pdf * US7342958(B2).pdf System and method for enhancing throughput in an additive Gaussian noise channel with a predetermined rate set and unknown interference Suman Das Thierry E. Klein Sayandev Mukherjee jun 2004 Lucent The authors propose a system which determines throughput achievable under superposition coding and adapt transmit power, constellation and superposed signal in order to maximize channel throughput. They assume that the channel can reliably support at least one of the rates in the pre-determined rate set with an arbitrarily small probability of decoding error. They provide a means to the constrained optimization problem which yields to an algorithm that optimizes both the subset of transmission rates that ought to be used, and the power allocations to the various rates and the corresponding noise power levels. ===== EP1622317-A2 ===== * EP1622317(A2).pdf Medium access control apparatus for use in a channel overlay network Chang-Woo Seo Kyung-Hun Jang Jin-Youn Cho Hyo-Sun Hwang jul 2005 Samsung The inventors proposed a medium access control scheme in which multiple MAC modules with potentially different protocols are coordinated by a central controller. The communication between the MAC modules and the controller is through the corresponding physical modules. The proposed scheme improves the QoS performance of an environment such as WLAN. ===== EP1843485-A1 ===== * EP1843485(A1).pdf * US20070230639(A1).pdf Multiple-input multiple-output (MIMO) spatial multiplexing system with dynamic antenna beam combination selection capability Richard Stirling-Gallacher mar 2003 Sony The document decribes a dynamic antenna beam selection scheme for a single-user MIMO system. The proposed scheme reduces the correlation between different RF signals and hence improves the error rate performance. ===== EP1852997-A1 ===== * EP1852997(A1).pdf * US20070002724(A1).pdf * WO2007126182(A1).pdf Apparatus and method for broadcast superposition and cancellation in a multi-carrier wireless network Farooq Khan aug 2006 Samsung The author proposes a broadcast superposition scheme in an OFDMA multi-user system. In the proposition, the broadcast signal for multiple destination is assumed to be transmitted in the first transmission time interval. Instead of transmitting exclusively the broadcast signal during this period, the transmitter superimposes a unicast signal for some subscriber station on the broadcast signal in order to gain extra data rate. ===== EP1901444-A1 ===== * EP1901444(A1).pdf Pilot overhead reduction in wireless communication systems utilizing multiple transmit antennas Ivan Cosovic sep 2006 NTT [[DoCoMo]] A non-orthogonal pilot allocation scheme for an OFDM MIMO system has been proposed. Instead of using a set of orthogonal pilot in time/frequency resource block for different antennas, the authors propose to position the pilot symbols for diffent antennas in the overlapped time/frequency resource block in order to reduce the pilot overhead. The resulting channel estimation problem is equivalent to a matrix estimation, unlike the orthogonal scheme in which the channel coefficients are estimated individually. ===== US20050068918-A1 ===== * US20050068918(A1).pdf * WO2005032035(A1).pdf Hierarchical coding with multiple antennas in a wireless communication system Ashok Mantravadi Avneesh Agrawal mar 2004 Qualcomm The authors proposes techniques to perform hierarchical coding in MIMO context. ===== US20060171347-A1 ===== * US20060171347(A1).pdf * WO2006081574(A1).pdf * US20070250638(A1).pdf * WO2007127751(A2,A3).pdf Supperposition coding in a wirelless communication system Rashid A. Attar Kiran Kiran jan 2005 Qualcomm The authors propose a method to compile user in a superposition coding scheme by ranking them on a result of an evaluation function. This scheduler procedure focus the cdma2000 1xEV-DO standard owned by Qualcomm. They propose several evalution functions depending of scheduler model (round robin, weighted round robin, bandwidth on demand, equal grade of serivce or porportionnally fair) and they propose tabulated transmission formats depending of user link qualities. At last they fully describe the procedure to decode up to four superimposed users. ===== US20060217080-A1 ===== * US20060217080(A1).pdf * WO2006104928(A2,A3).pdf High Quality detection based on sequential interference cancellation techniques Minh A. Nguyen Amir I. Zaghloul mar 2006 The Mitre Corporation The authors propose a sequential interference cancellation technique which takes advantage of ordering user to perform the iterative procedure. ===== US20060227851-A1 ===== * US20060227851(A1).pdf Multiple access method and system Steve Shattil feb 2006 The author proposes a new pluse based modulation named Carrier Interference Multiple Access. ===== US20060234789-A1 ===== * US20060234789(A1).pdf * US7099698(B2).pdf Complementary beamforming methods and apparatuses Vahid Tarokh Yang-Seok Choi Siavash Alamouti may 2006 Vivato The authors propose some complementary beamforming techniques to reduce the "hidden beam problem" in smart antenna application. ===== US20070060167-A1 ===== * US20070060167(A1).pdf * WO2007014021(A2).pdf Mutiplexing and feedback support for wireless communication systems Aleksandar Damnjanovic Lorenzo Casaccia Niels Peter Skov Andersen jul 2006 Qualcomm The authors propose a control scheme using packet headers for GSM EDGE RAN systems to increase spectral efficiency thought superposition coding. They describe a mean (via a control information channel) for a mobile station to delimit first and second payload data and a method for providing acknowledgment between multiple receivers and the transmitter by sending a special RLC/MAC block. ===== US20070195907-A1 (already reviewed) ===== * US20070195907(A1).pdf * WO2007089110(A2).pdf Method of transmitting and receiving data using superpostion modulation in a wireless communication system Shu Wang Young C. Yoon Sang G. Kim Li-Hsiang Sun Soonyil Kwon Suk Woo Lee Byung K. Yi feb 2007 LG Electronics The authors propose to rotate the superposed constellation in such a way that the minimum distance of any pair of points that are superimposed to different base constellation is maximized. This concept has also been presented in an IEEE802.16m contribution by LG. ===== US20070270170-A1 (already reviewed) ===== * US20070270170(A1).pdf * WO2007133051(A2).pdf Method of implementing superpostion coding for a forward link in a wireless communication system Young Cheul Yoon Shu Wang Suk Woo Lee may 2007 LG Electronics The authors propose a superposition coding scheme for various type of modulations. They claim that this scheme can be used for OFDM and CDMA systems, and that data and preamble can be encoded with this scheme if there exists overlapped far/near users transmission. They describe a specific implementation of a HSDPA scheduler and describe what modifications are needed on PDCCH frame format in order to handle superposition coding. They also provide details on HS-SCCH and HS-DSCH frame format modifications. ===== US7082159-B2 ===== * US7082159(B2,X6).pdf Method and arrangements in a telecommunications system Peter Larsson nov 2001 Ericsson The author proposes a method for providing multiple channel estimation in the field of STBC. It relies on sending pilot signal concurrently. The author also provides a channel estimation technique on that pilot frame format. ===== WO2004075470-A2 (already reviewed) ===== * WO2004075470(A2).pdf Controlled superposition coding in multi-user communication systems Rajiv Laroia Junyi Li Murari Srinivasan feb 2004 Flarion The authors propose a communication system where two users are scheduled based on their channel qualities. In this system, data transmission takes place in two phases: the signal of user 1 is superimposed on that of user 2 in phase 1. Then, the roles of the two users interchange in the second phase. It is shown that the link quality of both users is improved in this way. ===== WO2005074166-A1 ===== * WO2005074166(A1).pdf Methods and apparatus for overlaying multi-carrier and direct sequence spread spectrum signals in a broadband wireless communication system Xianoding Li Titus Lo Kemion Li Haiming Huang jan 2005 Waltical Solution The author propose a broadband wireless communication system wherein Multi-Carrier (MC) and Direct Sequence Spread Spectrum (DSSS) signals are overlaid in time and frequency domains to take advantage of each technique. MC is used for broadband data and and DSSS for specific processing (e.g. initial random access). The invention ensures that MC and DSSS are distinguishable and that the interference between both signals is minimized. ===== WO2006104928-A2 ===== * WO2006120555(A2,A3).pdf A mechanism to enable optimized provision of beacon information in WLAN networks Stefano Faccin Jari Jokela may 2006 Nokia The propose a method for interworking between a WLAN and one or more other networks (e.g. 3GPP, 3GPP2, IEEE 802.16). This method is based on the layering of beacons: the first beacon has the set of information that is needed by the AP to broadcast, and the second beacon has a subset of information depending on the current system load. The transmission of each beacon can be controlled by a certain threshold on the system load. ===== WO2008005326-A2 ===== * WO2008005326(A2,A3).pdf Method and apparatus for overlay-based enhanced TV service to 3G wireless handsets Katherine H. Guo Arun N. Netravali Krishnan K. Sabnani jun 2007 Lucent The author propose to enhance existing TV service on mobile phones by adding a unicast channel with interactive content to each user. The proposed approach comprises two steps: first a unicast channel is provided to the user, then this channel is used for the transmission of content that is less bandwidth demanding than video streaming (e.g. TV guide). The mobile includes a GUI to display the invention transmitted through the unicast channel. ===== Can't read ===== * JP2005017687(A).pdf * JP2006014338(A).pdf * JP2006128952(A).pdf * JP2007027932(A).pdf