公开(公告)号：EP1684454A4

公开(公告)日：2013-07-03

申请号：EP04818932

申请日：2004-11-17

申请人： PANASONIC CORP

发明人： MURAKAMI YUTAKA ,  KOBAYASHI KIYOTAKA ,  ORIHASHI MASAYUKI ,  MATSUOKA AKIHIKO ,  IMAMURA DAICHI ,  MALIK RAHUL

IPC分类号： H04J99/00 ,  H04L1/00 ,  H04B7/04 ,  H04B7/08 ,  H04L1/06 ,  H04L1/18 ,  H04L25/03 ,  H04L27/26

CPC分类号： H04B7/0413 ,  H04B7/0851 ,  H04L1/0057 ,  H04L1/0071 ,  H04L1/0086 ,  H04L1/0618 ,  H04L1/1819 ,  H04L5/0023 ,  H04L25/03229 ,  H04L25/03305 ,  H04L25/03324 ,  H04L25/03891 ,  H04L27/2628 ,  H04L27/265 ,  H04L2025/03414 ,  H04L2025/03611

摘要： Soft decision sections (503, 506) provisionally decide each modulated signal (502, 505) separated using an inverse matrix calculation of a channel fluctuation matrix at separation section (501). Signal point reduction sections (508, 510, 514, 516) reduce candidate signal points of a multiplexed modulated signal using the provisional decision results (504, 507). Soft decision sections (512, 518) make a correct decision using the reduced candidate signal points and obtain received data (RA, RB) of each modulated signal. This allows received data RA, RB with a good error rate characteristic to be obtained with a relatively small number of calculations without reducing data transmission efficiency.

公开(公告)号：EP1641180A4

公开(公告)日：2011-08-17

申请号：EP04747909

申请日：2004-07-16

申请人： PANASONIC CORP

发明人： MALIK RAHUL ,  TAN PEK-YEW

IPC分类号： H04W16/28 ,  H04B7/04 ,  H04J99/00 ,  H04L12/28 ,  H04W72/04 ,  H04W84/12

CPC分类号： H04W16/28 ,  H04B7/0408 ,  H04W72/046 ,  H04W84/12 ,  Y02D70/142 ,  Y02D70/20 ,  Y02D70/444

摘要： A method and system are disclosed that can be applied to achieve high-throughput in a WLAN. Central to the present invention is the use of an SDMA compatible multi-beam antenna system by a WLAN access point. A system based on two types of antennas-dynamic beam forming and fixed beam antennas- is described. A mechanism and protocol are described that implement simultaneous transmissions with respect to an SDMA compatible access point and thereby improve spectral efficiency, and by extension achieve higher throughput. Based on the recognition that current WLAN MAC has major limitations in throughput, certain MAC extensions (that can be applied independently of SDMA) are described. Also disclosed are power-saving and power control techniques that improve battery performance and contribute to a reduction in station size, and a means of reducing channel interference. The present invention also deals with the problem of backward compatibility with conventional devices that implement the protocol that is a subset covered by the present invention.

摘要翻译： 公开了可以应用于实现WLAN中的高吞吐量的方法和系统。 本发明的核心是通过WLAN接入点使用与SDMA兼容的多波束天线系统。 描述了基于两种类型的天线 - 动态波束形成和固定波束天线的系统。 描述了一种机制和协议，其实现相对于SDMA兼容接入点的同时传输，从而提高频谱效率，并且通过扩展实现更高的吞吐量。 基于对当前WLAN MAC在吞吐量方面具有主要限制的认识，描述了可以独立于SDMA应用的某些MAC扩展。 还公开了节电和功率控制技术，其提高电池性能并有助于降低电台尺寸，以及降低信道干扰的手段。 本发明还涉及与实现本发明覆盖的子集的协议的常规设备的向后兼容性的问题。