Diversity receiver and method therefor
A receiving source and algorithm technology, applied in the field of receivers, can solve problems such as attenuation of received signals
Inactive Publication Date: 2009-01-07
APPLE INC
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Problems solved by technology
However, due at least in part to unintentional reflections and scatter, multiple sensors often receive differently delayed and attenuated signals superimposed on each other of the transmitted signal
Received multipath components from the transmitted signal usually have different phases that may add together constructively or destructively, thereby attenuating the received signal
Method used
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[0031] The term "bus" is used herein to refer to a plurality of signal lines or conductors that can be used to convey one or more different types of information such as data, address, control or status. A wire as described herein may, for example, be illustrated or described as a single wire, a plurality of wires, a unidirectional wire, or a bidirectional wire. However, different implementations may vary the application of these wires. For example, separate unidirectional wires could be used instead of bidirectional wires, and vice versa. Also, instead of multiple wires, a single wire that transmits multiple signals in serial or time division multiplexed fashion can be used. Likewise, a single conductor carrying multiple signals may be split into various different conductors carrying subsets of these signals. Therefore, many options exist for transmitting signals.
[0032] The terms "assert" and "deassert" are used when referring to setting a signal, status bit, or similar de...
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Embodiments of the present invention relate generally to receivers. One embodiment relates to a digital FM (100) receiver having multiple sensors (e.g. antennas) (102,104). In one embodiment, the digital receiver includes a baseband unit (116) having a channel processing unit. In one embodiment, the channel processing unit is capable of calculating or estimating a phase difference between the incoming signals prior to combining them. One embodiment uses phase estimation method for diversity combining the signals while another embodiment utlizes a hybrid phase lock loop method. Also, some embodiments of the present invention provide for echo-cancelling after diversity combining. An alternate embodiment of the channel processing unit utilizes a space-time unit to diversity combine and echo cancelling for the incoming signals. Other embodiments of the present invention allow for the incoming signals from the multiple antennas to pass through the baseband unit uncombined, where the incoming signals may have different data formats.
Description
[0001] This application is a divisional application of the patent application with the application number 02816359.1, the application date is June 28, 2002, and the invention title is "diversity receiver and its method". technical field [0002] This invention relates generally to receivers, and more particularly to radio receivers. Background technique [0003] Often multiple sensing devices such as antennas are employed to provide more information to the receiver. However, due at least in part to unintentional reflections and scatter, multiple sensors typically receive superimposed signals of the transmitted signal that are differently delayed and attenuated. The received multipath components from the transmitted signal typically have different phases which may add together constructively or destructively, thereby attenuating the received signal. Therefore, there is a need for an improved receiver to efficiently combine or process these received signals from multiple sens...
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IPC IPC(8): H04B7/08H04B1/10H04B1/28H04L1/06H04L27/38
CPCH04B7/0865H04B7/0891H04L1/0618H04B7/084H04B7/0871H04L27/38
Inventor 李君颂乔恩·D.·亨德里克斯查尔斯·E.·塞伯格何耀伦艾兹法·因纳雅图拉
Owner APPLE INC