Modem architecture
View Patent ↗A modem device for use in a wireless communications terminal comprises a plurality of functional units to perform signal processing tasks which are connected in a ring structure. Each of the functional units comprises a local processor, a plurality of hardware accelerators and a switching matrix connected between a data input of the respective functional unit and each of the sub-components. The local processor receives task instructions from a controller of the modem device over a first bus system that uses a first protocol which includes addressing, and in response to the task instructions configures the hardware accelerators and switches the switching matrix to selectively produce connections between the data input and the hardware accelerators in a manner to perform the intended task. Data flow occurs in a ring structure between said functional units and through each of the functional units using a second protocol without addressing.
1. A modem device for use in a wireless communication terminal, the modem device comprising: a plurality of functional units configured to perform signal processing tasks, wherein: said plurality of functional units are connected in a ring structure; each of the functional units comprises a plurality of sub-components including a local processor, a plurality of hardware accelerators and further comprises a switching matrix connected between a data input of a respective functional unit and each of said sub-components; said local processor configured to receive task instructions from a controller of the modem device over a first bus system using a first protocol which includes addressing and an advanced high-performance bus (AHB) based protocol and, in response to said task instructions, arranged to configure the sub-components and configured to switch the switching matrix to selectively produce connections between said data input and said sub-components in a manner to perform said task; and wherein data flow in said ring structure between said functional units and within each functional unit is performed using a second protocol without addressing, said second protocol further configured to have three binary signals including a valid and an accept signal for handshaking between a data source and a data sink, and a frame signal which marks a beginning and an end of a logical group of data elements within a data stream.
2. The modem device of claim 1 wherein said local processor comprises at least one of a reduced instruction set computer (RISC) and a digital signal processor.
3. The modem device of claim 2 , wherein at least one of the functional units comprises at least one memory module.
4. The modem device of claim 1 wherein said respective functional unit is one of a group consisting of a digital front end (DFE) unit, Long Term Evolution transmit (LTE Tx) unit, shared random access memory (RAM) unit, forward error correction (FEC) data unit, fast Fourier transform (FFT) unit, parameter estimation unit, equalizer unit, searcher unit, and FEC control unit.