400m 64x18 Error Correction Code
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They were conceived in 1966 by Dave Forney as a solution to the problem of finding a code that has both exponentially decreasing error probability with increasing block length and polynomial-time decoding complexity.[1] Concatenated codes became widely used in space communications in the 1970s. error detection and correction Contents 1 Background 2 Description 3 Properties 4 Decoding concatenated codes 4.1 Remarks 5 Applications 6 error detection and correction in computer networks Turbo codes: A parallel concatenation approach 7 See also 8 References 9 Further reading 10 External links Background[edit] The field of channel coding is
Error Detection And Correction Using Hamming Code Example
concerned with sending a stream of data at the highest possible rate over a given communications channel, and then decoding the original data reliably at the receiver, using encoding and decoding algorithms that are feasible to implement in a
Error Detection And Correction In Data Link Layer
given technology. Shannon's channel coding theorem shows that over many common channels there exist channel coding schemes that are able to transmit data reliably at all rates R {\displaystyle R} less than a certain threshold C {\displaystyle C} , called the channel capacity of the given channel. In fact, the probability of decoding error can be made to decrease exponentially as the block length N {\displaystyle N} of the coding scheme goes to infinity. However, the complexity of a naive crc error detection optimum decoding scheme that simply computes the likelihood of every possible transmitted codeword increases exponentially with N {\displaystyle N} , so such an optimum decoder rapidly becomes infeasible. In his doctoral thesis, Dave Forney showed that concatenated codes could be used to achieve exponentially decreasing error probabilities at all data rates less than capacity, with decoding complexity that increases only polynomially with the code block length. Description[edit] Schematic depiction of a concatenated code built upon an inner code and an outer code. This is a pictorial representation of a code concatenation, and, in particular, the Reed–Solomon code with n=q=4 and k=2 is used as the outer code and the Hadamard code with n=q and k=log q is used as the inner code. Overall, the concatenated code is a [ q 2 , k log q ] {\displaystyle [q^{2},k\log q]} -code. Let Cin be a [n, k, d] code, that is, a block code of length n, dimension k, minimum Hamming distance d, and rate r = k/n, over an alphabet A: C i n : A k → A n {\displaystyle C_{in}:A^{k}\rightarrow A^{n}} Let Cout be a [N, K, D] code over an alphabet B with |B| = |A|k symbols: C o u t : B K → B N {\displaystyle C_{out}:B^{K}\rightarrow B^{N}} The inner code Cin takes one of |A|k = |B| possible inputs, encodes into an n-tuple over A, transmits, and decodes i
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10 First Offer $1.00 Auction Started Feb 1, 2012 7:00:39 AM MST Auction Ended Feb 15, 2012 3:00:00 PM MST Seller Lake Havasu City [View seller's auctions] Pick-up Location http://www.publicsurplus.com/sms/auction/view?auc=672186 Lake Havasu City [Map It] 2330 McCulloch Blvd N Lake Havasu City, AZ 86403 Auction Contact Please login to view contact Payment Visa, MasterCard, Discover Shipping Buyer must pickup item(s) Share | Bid History [View bid history] Questions You can ask the seller questions about this auction after you login. Description Used Dell Precision WorkStation 330 Tower service tag # 6G0QY01, error detection unit will NOT come with a power cord, keyboard, mouse and operating system. Original System Configuration is listed below. Unit may include some of the listed factory installed items, but is not guaranteed: Quantity Parts # Part Description 1 0E904 Processor, 80528, 1.5GHZ, 0K, 400 C1 1 4406C ASSEMBLY..., CABLE..., DORADO/ATHENS/TUALATIN/ALMODOR..., 40P, INTERNAL..., ENHANCED INTEGRATED DRIVE ELECTRONICS..., EARTHQUAKE/OCELOT/MEDIUM... 1 57589 CABLE..., AUDIO..., MOLEX TO error detection and MOLEX 1 6E153 Printed Wiring Assembly, PlanarPrecision WorkStations 330 NIC, 4RIMM, ICHB4 1 5120P Cord, Power, 125V, 6Feet, SJT..., Unshielded 1 52EVD Mouse, PERSONAL SYSTEM 2..., 6P, 3 Button, Logi MG 2 5186P Rambus Inline Memory Module, 128, 400M, 64X18, Error Correction Code, 8C, W 2 9578D Card, Printed Wiring Board, Memory, Rambus In Line Memory Module, Continuity, Rambus 1 79EKD Modem, V90, Internal, DFAX CU, ASIA, LATIN AMERICA, NORTH AMERICA... 1 70NYT Compact Disk, 128K, IDE 5.25", 48X, LENGTH/LONG..., 8482B, MIDNIGHT GRAY... 1 1E200 Card, Video, nVIDIA, 32M, NV15 2X32 1 7F454 Floppy Drive, 1.44M, 3.5" FORM FACTOR..., 3MD, NBZ NEC, 418, Midnight Gray 1 9966C CABLE..., ASSEMBLY..., 34P, INTERNAL..., FLOPPY DRIVE..., 1DROP, HUNNICUT/LOW PROFILE... 1 4D302 Tape Backup, 10/20G, 5.25" FORM FACTOR..., Half Height, NO CONTROLLER/WITH CABLES..., I, SEAGATE..., MG142 1 01FNM HARD DRIVE..., 20G, I, 7.2K, 3.5" FORM FACTOR..., 1N, 20P, SEAGATE... 1 2851P Cable Assembly, ATA66, 2DROP, Rhino Blizzard Tower 1 86NXP KIT..., DOCUMENTATON ON FLOPPY DISK..., DELL NT WORKSTATION 4.X..., SP5, 5.25" FORM FACTOR..., ENGLAND/ENGLISH... Condition: UNKNOWN Note: Click on pictures below to view larger image Sale of all item(s) is AS-IS and W