US 6,618,434 B2 · Adaptive, multimode rake receiver for dynamic search and multipath reception

Abstract

The present invention concerns a new type of rake receiver, namely, a multimode rake receiver, which may be included within either a mobile station or a base station, and which has dynamic pilot signal searching and multipath reception and combining capability, for CDMA, cdma2000, W-CDMA, or other mobile communication systems. The adaptive, multimode rake receiver includes a network interface, a plurality of adaptive multimode rake fingers, and a multimode processor. Each adaptive multimode rake finger and the multimode processor are responsive to first configuration information (a first mode signal) to configure for a path reception functional mode and are further responsive to second configuration information (a second mode signal) to configure for a searcher functional mode, providing the multimode rake receiver with acquisition, traffic, and idle modes. In the preferred embodiment, the multimode rake receiver is implemented using a new category of integrated circuitry for adaptive or reconfigurable computing, providing a plurality of heterogeneous computational elements coupled to an interconnection network, to form adaptive and reconfigurable multimode rake fingers and a multimode processor, for a plurality of different functional modes, including pilot signal searching and multipath reception and combination.

Claims50

Dependent claims

A multimode rake receiver, comprising:

a network interface;
a plurality of adaptive multimode rake fingers coupled to the network interface, the plurality of adaptive multimode rake fingers comprising a first plurality of heterogeneous computational elements having at least two different fixed architectures, wherein the first plurality of heterogeneous computational elements are configurable to form the plurality of adaptive multimode rake fingers, the first plurality of heterogeneous computational elements are capable of responding to a first mode signal to configure for a first functional mode for path reception, capable of responding to a second mode signal to configure for a second functional mode for searching, and capable of responding to a third mode signal to configure for a third functional mode;
and
a multimode processor coupled to the plurality of adaptive multimode rake fingers, the multimode processor capable of responding to the first mode signal to configure for the first functional mode for path reception, capable of responding to the second mode signal to configure for the second functional mode for searching, and further capable of responding to the third mode signal to configure for a third functional mode.

1 more element

An apparatus for direct-sequence spread spectrum reception including multimode rake functional modes, the apparatus comprising:

a plurality of heterogeneous computational elements, a first computational element of the plurality of computational elements having a first fixed architecture and a second computational element of the plurality of computational elements having a second fixed architecture, the first fixed architecture being different than the second fixed architecture;
and
an interconnection network coupled to the plurality of heterogeneous computational elements, the interconnection network capable of configuring the plurality of heterogeneous computational elements for a first functional mode for multipath reception in response to first configuration information, the interconnection network further capable of reconfiguring the plurality of heterogeneous computational elements for a second functional mode for searching in response to second configuration information, and the interconnection network further capable of reconfiguring the plurality of heterogeneous computational elements for a third functional mode in response to third configuration information, the third functional mode different than the first and second functional modes.

A method for adaptive rake reception, the comprising:

receiving an incoming signal;
configuring a plurality of heterogeneous computational elements in response to configuration information to form a plurality of adaptive multimode rake fingers;
in response to first configuration information, configuring the plurality of adaptive multimode rake fingers for a first functional mode for path reception to provide multipath reception of the incoming signal;
in response to second configuration information, configuring the plurality of adaptive multimode rake fingers for a second functional mode for searching to provide a plurality of pilot signal determinations from the incoming signal;
and
in response to third configuration information, configuring the plurality of adaptive multimode rake fingers for a third functional mode, the third functional mode being different than the first and second functional modes.

3 more elements

An apparatus for direct-sequence spread spectrum code division multiple access wireless reception, the apparatus comprising:

a plurality of heterogeneous computational elements, the plurality of heterogeneous computational elements including a first computational element having a first fixed architecture and a second computational element having a second fixed architecture, the first fixed architecture being different than the second fixed architecture;
and
an interconnection network coupled to the plurality of heterogeneous computational elements, the interconnection network capable of configuring the plurality of heterogeneous computational elements to form a plurality of adaptive multimode rake fingers to provide a plurality of rake functional modes and to form a multimode processor coupled to the plurality of adaptive multimode rake fingers, and the interconnection network further capable of configuring the plurality of heterogeneous computational elements to provide a non-rake functional mode.

A multimode rake receiver, comprising:

a network interface;
a plurality of adaptive multimode rake fingers coupled to the network interface, each adaptive multimode rake finger of the plurality of adaptive multimode rake fingers comprising a plurality of heterogeneous computational elements capable of responding to a first mode signal to configure for a first functional mode for path reception, further capable of responding to a second mode signal to configure for a second functional mode for searching, and further capable of responding to a third mode signal to configure for a third, non-rake functional mode;
a multimode processor operably coupled to the plurality of adaptive multimode rake fingers, the multimode processor comprising a plurality of heterogeneous computational elements capable of responding to the first mode signal to configure for the first functional mode for path reception;
further capable of responding to the second mode signal to configure for the second functional mode for searching;
and further capable of responding to the third mode signal to configure for the third, non-rake functional mode;
wherein when the multimode rake receiver is in an acquisition mode, all adaptive multimode rake fingers of the plurality of adaptive multimode rake fingers are configured for the second functional mode for searching and the multimode processor is configured for the second functional mode for searching;
wherein when the multimode rake receiver is in a traffic mode, a first subset of adaptive multimode rake fingers of the plurality of adaptive multimode rake fingers and a first portion of the multimode processor are configured for the second functional mode for searching;
and a second subset of adaptive multimode rake fingers of the plurality of adaptive multimode rake fingers and a second portion of the multimode processor are configured for the first functional mode for path reception;
wherein the first subset of adaptive multimode rake fingers configured for the second functional mode for searching and the second subset of adaptive multimode rake fingers configured for the first functional mode for path reception are dynamically determined based upon at least one channel-dependent parameter selected from a plurality of channel-dependent parameters, the plurality of channel-dependent parameters further comprising a pilot signal relative power level, a number of identified multipaths, a number of identified base stations, received traffic signal-to-noise ratio, and received traffic error rate.

6 more elements

Dependencies are inferred from the claim text.

Adaptive, multimode rake receiver for dynamic search and multipath reception

Life of this patent

Adaptive, multimode rake receiver for dynamic search and multipath reception

Life of this patent

Abstract

Claims50