白丝美女被狂躁免费视频网站,500av导航大全精品,yw.193.cnc爆乳尤物未满,97se亚洲综合色区,аⅴ天堂中文在线网官网

Methods and apparatus for partial interference reduction within wireless networks

專利號(hào)
US10785783B2
公開日期
2020-09-22
申請(qǐng)人
APPLE INC.(US CA Cupertino)
發(fā)明人
Markus Mueck; Maik Bienas; Andreas Schmidt
IPC分類
H04K1/10; H04L27/28; H04W72/12; H04J11/00; H04L5/00; H04L25/497; H04B15/00; H04W72/08
技術(shù)領(lǐng)域
bs,ue,pilot,tones,in,data,cir,or,be,frequency
地域: CA CA Cupertino

摘要

Methods and apparatus that enable one or more wireless networks to minimize inter-cellular interference (ICI) at a receiver. In one embodiment, the network comprises an OFDM-based cellular network, and the method comprises utilizing a priori knowledge of non-data portions of signals from multiple base stations in order to schedule transmissions. In one variant, these non-data portions comprise pilot tones; the pilot tones can be scheduled onto various time-frequency resources of the network so as to minimize ICI. The mobility context of the receiver can also be used as a basis for dynamically adjusting the pilot tone density. In another variant, precoding (e.g., Tomlinson-Harashima precoding) can be applied to “shape” the non-data portions of the transmitted signals so as to mitigate ICI. In yet other variants, frame preambles and learning sequences are used as the basis for invoking selective transmission time shifts across the potentially interfering base stations so as to minimize ICI.

說明書

In another aspect, a computer-readable apparatus comprising a storage medium and adapted for use within a wireless transmitter or receiver is disclosed.

In yet another aspect of the invention, business methods and models employing one or more of the foregoing aspects are described.

Other features and advantages of the present invention will immediately be recognized by persons of ordinary skill in the art with reference to the attached drawings and detailed description of exemplary embodiments as given below.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1A is time and frequency plot of a typical prior art Time Division Multiple Access (TDMA) implementation.

FIG. 1B is time and frequency plot of a typical prior art Frequency Division Multiple Access (FDMA) implementation.

FIG. 1C is time and frequency plot of a typical prior art Code Division Multiple Access (CDMA) implementation.

FIG. 1D is time and frequency plot of a typical prior art Orthogonal Frequency-Division Multiple Access (OFDMA) implementation.

FIG. 2 is a graphical representation of a typical prior art cellular telephone system.

FIG. 2A is a graphical illustration of a typical prior art OFDMA cellular system implementing 3GPP LTE technology.

FIG. 2B is a graphical illustration of the process of forming an “imaginary” base station comprising the superposition of three (3) actual base stations.

權(quán)利要求

1
微信群二維碼
意見反饋