Diversity transmission system for sub-band diversity reception
First Claim
1. Diversity transmission system comprising a transmitter, said transmitter being coupled to a receiver via a plurality of channels, said receiver comprising combining means for combining the output signals of the channels, characterized in that the combining means comprises separating means for separating the output signal of each channel into a plurality of different frequency sub-band signals and in that the combining means comprises frequency sub-band combining means for combining corresponding frequency sub-band signals from different channels into combined frequency sub-band signals.
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Abstract
In a diversity transmission system the problem arises that almost no improvement can be obtained when the signals to be received show frequency selective fading within the band width of the signal to be transmitted. To solve this problem the signal to be received is separated by filter banks into a number of sub-band signals. Corresponding sub-band signals of different filter banks are combined by the combiners into combined sub-band signals. These combined sub-band signals are combined to a broad band signal by a final combiner.
160 Citations
14 Claims
- 1. Diversity transmission system comprising a transmitter, said transmitter being coupled to a receiver via a plurality of channels, said receiver comprising combining means for combining the output signals of the channels, characterized in that the combining means comprises separating means for separating the output signal of each channel into a plurality of different frequency sub-band signals and in that the combining means comprises frequency sub-band combining means for combining corresponding frequency sub-band signals from different channels into combined frequency sub-band signals.
- 12. Receiver for receiving a plurality of output signals from a plurality of channels comprising combining means for combining the output signals of the channels, characterized in that the combining means comprises separating means for separating the output signals of the channels into a number of different frequency sub-band signals and in that the combining means comprises frequency sub-band combining means for combining corresponding frequency sub-band signals from different channels into combined frequency sub-band signals.
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14. Combining means for combining a plurality of output signals from different channels, characterized in that the combining means comprises separating means for separating the output signals of the channels into a number of different frequency sub-band signals and in that the combining means further comprises frequency sub-band combining means for combining corresponding frequency sub-band signals from different channels into combined frequency sub-band signals.
Specification