Xilinx Blocks

Block Parameters Dialog Box

The Xilinx puncture block can be configured using its Block Parameters dialog box.

Figure 3-38: Puncture block parameters dialog box

Parameters specific to the Xilinx Puncture block are:

∙Puncture Code: specifies the puncture pattern for removing the bits from the input.

Other parameters used by this block are described in the Common Parameters section of the previous chapter.

The Puncture block does not use a Xilinx LogiCORE.

RS Decoder

RS (Reed-Solomon) codes are block-based error correcting codes with a wide range of applications in digital communications and storage. The Xilinx RS Decoder core handles both full length and shortened systematic codes. The Reed-Solomon decoder takes a block of digital data and processes each block and attempts to correct errors and recover the original data.

A Reed-Solomon code is specified as RS(n,k) with s-bit symbols. Reed-Solomon codes are usually referred to as (n,k) codes, where n is the total number of symbols in a code block and k is the number of information or

data symbols. See the RS Encoder block documentation for more details. A Reed- Solomon decoder can correct up to t symbols that contain errors in a codeword, where 2t = n-k.

The RS decoder can correct up to t errors or up to 2t erasures. An erasure occurs when the position of an erred symbol is known. Erasure information is generally supplied by the demodulator in a digital communication system, i.e. the demodulator flags received symbols that are likely to contain errors. When a codeword is decoded, there are three possible outcomes:

1.If 2p + r < 2t (p errors, r erasures) the original transmitted code word will always be recovered

2.The decoder will detect that it cannot recover the original code word and will indicate a failure in decoding.

3.The decoder will mis-decode and recover an incorrect code word without any indication.

Communication

59

Page 58 Page 60
Page 59
Image 59
Xilinx V2.1 manual RS Decoder, Puncture block parameters dialog box
Page 58 Page 60

V2.1 specifications

Xilinx V2.1 is a notable iteration in the series of versatile and robust Field-Programmable Gate Arrays (FPGAs) developed to cater to a wide range of applications. Launched to provide enhancements in performance and flexibility, V2.1 embodies sophisticated technologies and features that stand out in the electronics industry.

One of the primary features of Xilinx V2.1 is its improved processing power. The architecture has been optimized to support higher clock speeds and increased logic density, allowing for more complex designs to be implemented effectively. This boost in performance is facilitated by utilizing advanced silicon technologies, which significantly reduce power consumption while maximizing efficiency.

Another significant characteristic of Xilinx V2.1 is its enhanced I/O (Input/Output) capabilities. The device supports a variety of industry-standard interfaces, which include PCI Express, SATA, and various serial communication protocols. Such adaptability ensures seamless integration into existing systems, providing engineers with the flexibility to adapt to various application requirements without the need for substantial redesign efforts.

Xilinx V2.1 also features improved scalability, making it a prime choice for applications that demand diverse performance levels. This device supports an array of configurations and can be used in small-scale projects as well as in larger, more demanding environments requiring extensive resources. This scalability is further aided by support for multiple development platforms, enabling rapid prototyping and simplifying the design process.

Security is increasingly becoming a priority in digital design, and Xilinx V2.1 addresses this concern via hardware security features. It includes enhanced encryption protocols and secure boot functionalities, which help protect intellectual property and sensitive data from unauthorized access.

Additionally, the integration of advanced DSP (Digital Signal Processing) blocks allows Xilinx V2.1 to efficiently handle data-intensive tasks such as video processing and real-time signal analysis. These capabilities make it suitable for applications in telecommunications, automotive systems, and industrial automation.

Xilinx V2.1 also benefits from a rich development environment, including robust software tools that facilitate design entry, simulation, and verification. The support for industry-standard programming languages like VHDL and Verilog simplifies the development process, enabling engineers to design complex systems more efficiently.

In summary, Xilinx V2.1 stands out due to its impressive combination of high performance, flexibility, scalability, security, and comprehensive development support. These features make it a valuable asset for engineers and developers looking to innovate across various sectors, from telecommunications and automotive to industrial applications.
Top Page Image Contents