CS3710 Amphion, CS3710 Datasheet

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CS3710

Manufacturer Part Number
CS3710
Description
32 Qam Modulator
Manufacturer
Amphion
Datasheet

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The CS3710 32 QAM modulator core provides a complete baseband solution for broadband data transmission.
This application specific silicon core has been developed to provide an efficient and highly optimized solution
for wireless data networks. Combined with the CS3810 32 QAM demodulator core, data transmission speeds of
up to 155Mbps can be achieved at low error rates. The CS3710 is suited for application areas such as point to
point WLAN, Metropolitan Area Network, wireless VPN and other data, voice and video applications. This core
combines easily with the CS5200 series of AES cryptography cores to create secure high speed data links.
The CS3710 can accept a continuous stream of user input data and modulate it to a spectrally shaped 32QAM
constellation, suitable for wireless transmission. Error resilience is provided using a concatenated forward error
correction (FEC) scheme including Reed-Solomon coding, interleaving and convolutional coding to provide low
BER at the receiver. The core parameters may be set using an integrated microprocessor interface. This same
interface may also be used to read back the core parameter settings at any particular time.
Figure 1: Block Diagram of CS3710/CS3810 Broadband Wireless Modulation/Demodulation Cores
Data Input
Test Input
Fully integrated modulator supports
transmission of voice, data and video up to
155Mbps
Continuous mode operation
32 QAM modulation
Available on FPGA implementation
Parallel microprocessor interface (Motorola
style)
Built in PN data generator
Built in SSB tone generator
Concatenated Convolutional and Reed
Solomon coded error protection
Separate I-Q outputs
Transmitter clock may be slaved to CS3810
32 QAM demodulator recovered clock
Internal byte clock to symbol clock
conversion
CS3710 Broadband Wireless Modulator Core
Encoding
Data
FEATURES
Spectral Shaping
Control Registers
Controller/
Processor
Amphion continues to expand its family of application-specific cores
Protection
Error
CS3710
See http://www.amphion.com for a current list of products
32 QAM Modulator
Mapping
TXI_OUT
TXQ_OUT
ADC
RF
Test Input
RF
Wireless Metropolitan Area Network
Wireless LAN
Secure wireless VPN
Broadband voice, data and video
transmission
CS3810 Broadband Wireless Demodulator Core
DAC
APPLICATIONS
Virtual Components for the Converging World
Filtering
Control Registers
Synchronisation
Error Correction
Timing/symbol
& Recovery
Decode &
Controller/
Processor
recovery
formatter
Output
Data Out
TM
1

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CS3710 Summary of contents

Page 1

... Combined with the CS3810 32 QAM demodulator core, data transmission speeds 155Mbps can be achieved at low error rates. The CS3710 is suited for application areas such as point to point WLAN, Metropolitan Area Network, wireless VPN and other data, voice and video applications. This core combines easily with the CS5200 series of AES cryptography cores to create secure high speed data links ...

Page 2

... CS3710 32 QAM Modulator INPUT/OUTPUT DESCRIPTION Table 1 describes the input and output ports (shown graphically in Figure 2) of the CS3710 modular core. Unless otherwise stated, all signals are active high and bit(0) is the least significant bit. The internal architecture of the Core is illustrated in Figure 3. ...

Page 3

... Table 1: CS3710 32 QAM Modulator Interface Signal Descriptions Name I/O TWOSCOM I MODULATOR LOOP BACK INPUT RXDATA[7:0] I RXSYNC I MODULATOR OUTPUT INTERFACE TXI_OUT[9:0] O TXQ_OUT[9:0] O TX_Valid O TXFULL O TXEMPTY O TCM_I[4:0] O TCM_Q[4:0] O TCM_Valid O SYSTEM CLOCKS Each sub-block function in Figure 3 is described in this section. The CS3710 has two clock signals, namely, TXUSRCLK and CLK ...

Page 4

... CS3710 32 QAM Modulator UNIQUE WORD INSERTION The insertion of unique word information for receiver frame synchronization follows the scheme outlined in the Intelsat standard IESS-308. The insertion of the unique word occurs every 16 RS codewords which makes up a superframe assumed that the first frame input after reset is the first block of a superframe ...

Page 5

SRRC FILTER The SRRC (Square Root Raised Cosine) Filter consists of two multiple-rate filters performing the shaping and filtering function for the I-Q samples. Note that the filter is not normalised, as this considered in the hardware. ...

Page 6

... CS3710 32 QAM Modulator The timing characteristics of the CS3710 QAM 32 Broadband Wireless Modulator are illustrated in Figure 6. 1 TXUSRCLK /RESET TXSYNC TXDATA 0 CLK TX_Valid TXI _OUT TXQ_OUT Figure 6: Input/Output Timing The relation of sync, clock and the data symbols is summarised in the following table which uses implementation on Altera APEX20K CPLD for illustration purposes ...

Page 7

... Amphion products, combined with the rapid design times offered by today's leading programmable logic solutions. The following performance and density metrics has been obtained when the CS3710 is implemented as a stand-alone design in the device specified below. It should be noted that if the function is implemented on different FPGA devices, or combined with additional logic in larger devices, then additional constraints might need to be applied to achieve the similar metrics ...

Page 8

... CS3710 32 QAM Modulator BOUT AMPHION Amphion (formerly Integrated Silicon Systems) is the leading supplier of speech coding, video/ image processing and channel coding application specific silicon cores for system-on-a-chip (SoC) solutions in the broadband, wireless, and mulitmedia markets Web: www.amphion.com Email: info@amphion.com SALES AGENTS ...

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