CN102487370A - Transmission mode adjusting method, transmission mode controller and transmission equipment - Google Patents
Transmission mode adjusting method, transmission mode controller and transmission equipment Download PDFInfo
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Abstract
The invention discloses a transmission mode adjusting method, a transmission mode controller and transmission equipment. The method comprises the following steps of: when the transmission equipment requires some transmission mode, according to mapping relation of the connection relation between a preset transmission mode and a symbol mapping mode, between the preset transmission mode and an upper sampling module, between an inverse fast Fourier transform (IFFT) module and the symbol mapping mode, between the IFFT module and the upper sampling module, as well as between the IFFT module and a channel balancing module and between the IFFT module and a channel decoding module, adjusting the connection relation between the IFFT module and the symbol mapping mode, between the IFFT module and the upper sampling module, between the IFFT module and the channel balancing module, and between the IFFT module and the channel decoding module to correspond to the transmission mode. The connection relation between the IFFT module and the symbol mapping mode, between the IFFT module and the upper sampling module, between the IFFT module and the channel balancing module, and between the IFFT module and the channel decoding module is adjusted through the preset mapping relation, so one transmission equipment can support a plurality of transmission modes.
Description
Technical field
The present invention relates to wireless communication technology field, particularly relate to a kind of transmission mode method of adjustment, transmission mode controller and transmission equipment.
Background technology
In radio communication, because the influence of multipath, thereby can the formation time disperse cause intersymbol interference.In the technology of antagonism intersymbol interference, OFDM (OFDM) is the most representative with two technology of SC-FDE (single carrier frequency domain equalization).Also these two technology are classified simultaneously as the transmission plan of physical layer in the IEEE802.16a standard.
On the complexity of transmission system frame structure and calculating, SC-FDE and OFDM technology are very approaching.As if but SC-FDE is analytically better in theory: it not only has the advantage of OFDM, also relies on single carrier to overcome the high PAPR among the OFDM (peak-to-average power ratio) inferior position, and the cost of transceiver implementation is reduced.
In high speed sensing net; Each node is a no center ad hoc networking, and the composition more complicated of node in the network, and the wireless communication mode of different nodes can be different; In order to guarantee the connectivity of network, need part of nodes in the network and can support multiple transmission mode.
The physical layer of a common OFDM transmission system comprises and transmits and receives two signal processing links.As shown in Figure 1, in transmitting chain, comprise modules such as chnnel coding, sign map, IFFT (inverse fast Fourier transform), up-sampling; In receiving link, comprise down-sampling, synchronously, modules such as FFT (fast Fourier transform), channel equalization and channel decoding.
The physical layer of a common SC-FDE transmission system comprises and transmits and receives two signal processing links.As shown in Figure 2, in transmitting chain, comprise modules such as chnnel coding, sign map, up-sampling; In receiving link, comprise down-sampling, synchronously, modules such as FFT, channel equalization, IFFT and channel decoding.
There is marked difference in above-mentioned two kinds of transmission systems on the physical layer signal handle link, can't realize intercommunication, so can not carry out data interaction between the high speed sensing net node of these two kinds of transmission systems, have influenced the connectivity of network.
Existing a solution is integrated many cover transmission systems in a transmission equipment, and supporting multiple transmission mode, but this obviously can bring the problem that transmission equipment is complicated, cost is high, influences the application of transmission equipment in high speed sensing net; Further, also can cause the volume of transmission equipment and power consumption big.
Summary of the invention
The purpose of this invention is to provide a kind of transmission mode method of adjustment, transmission mode controller and transmission equipment,, support multiple transmission mode with under the prerequisite that does not increase transmission equipment complexity and cost.
At first; The invention provides a kind of transmission mode method of adjustment; Transmission equipment has a cover functional module, and said functional module comprises channel coding module, sign map module, inverse fast Fourier transform IFFT module, up-sampling module, down sample module, synchronization module, fast Fourier transform FFT module, channel equalization module and channel decoding module; According to the Signal Processing order, in transmitting chain, comprise channel coding module, sign map module and up-sampling module successively, in receiving link, comprise down sample module, synchronization module, FFT module, channel equalization module and channel decoding module successively;
Then said method comprises:
When transmission equipment need adopt certain transmission mode; According to the mapping relations of annexation between the transmission mode that presets and IFFT module and sign map module, the up-sampling module and between IFFT module and channel equalization module, the channel decoding module, with between IFFT module and sign map module, the up-sampling module and the annexation between IFFT module and channel equalization module, the channel decoding module be adjusted into said transmission mode corresponding.
When said transmission mode is the orthogonal frequency division multiplex OFDM receive-transmit system, saidly specifically can comprise according to mapping relations adjustment annexation:
The IFFT module is connected respectively with the up-sampling module with the sign map module, so that the signal that spreads out of from the sign map module imports the up-sampling module into through the IFFT module; IFFT module and channel equalization module and channel decoding module are broken off respectively, so that the signal that spreads out of from the channel equalization module directly imports the channel decoding module into.
When said transmission mode is single carrier frequency domain equalization SC-FDE receive-transmit system, saidly specifically can comprise according to mapping relations adjustment annexation:
IFFT module and sign map module and up-sampling module are broken off respectively, so that the signal that spreads out of from the sign map module directly imports the up-sampling module into; The IFFT module is connected respectively with the channel decoding module with the channel equalization module, so that the signal that spreads out of from the channel equalization module imports the channel decoding module into through the IFFT module.
When said transmission mode during, saidly specifically can comprise according to mapping relations adjustment annexation for single carrier frequency domain equalization SC-FDE emission, orthogonal frequency division multiplex OFDM receiving system:
IFFT module and sign map module and up-sampling module are broken off respectively, so that the signal that spreads out of from the sign map module directly imports the up-sampling module into; IFFT module and channel equalization module and channel decoding module are broken off respectively, so that the signal that spreads out of from the channel equalization module directly imports the channel decoding module into.
When said transmission mode is orthogonal frequency division multiplex OFDM emission, single carrier frequency domain equalization SC-FDE receiving system, saidly specifically can comprise according to mapping relations adjustment annexation:
The IFFT module is connected respectively with the up-sampling module with the sign map module, so that the signal that spreads out of from the sign map module imports the up-sampling module into through the IFFT module; The IFFT module is connected respectively with the channel decoding module with the channel equalization module, so that the signal that spreads out of from the channel equalization module imports the channel decoding module into through the IFFT module.
Preferably, said IFFT module is connected respectively with sign map module, up-sampling module, channel equalization module and channel decoding module, and the IFFT module is carried out the IFFT processing through multiplexing respectively to transmitting chain and the signal that receives link.
Optional; Said IFFT module comprises an IFFT submodule and the 2nd IFFT submodule; Wherein, an IFFT submodule is connected respectively with the up-sampling module with the sign map module, and the 2nd IFFT submodule is connected respectively with the channel decoding module with the channel equalization module.
Secondly; The invention provides a kind of transmission mode controller; Transmission equipment has a cover functional module, and said functional module comprises channel coding module, sign map module, inverse fast Fourier transform IFFT module, up-sampling module, down sample module, synchronization module, fast Fourier transform FFT module, channel equalization module and channel decoding module; According to the Signal Processing order, in transmitting chain, comprise channel coding module, sign map module and up-sampling module successively, in receiving link, comprise down sample module, synchronization module, FFT module, channel equalization module and channel decoding module successively; Then said transmission mode controller comprises:
Adjusting module; Transmission equipment is used for when need adopt certain transmission mode; According to the mapping relations of annexation between the transmission mode that presets and IFFT module and sign map module, the up-sampling module and between IFFT module and channel equalization module, the channel decoding module, with between IFFT module and sign map module, the up-sampling module and the annexation between IFFT module and channel equalization module, the channel decoding module be adjusted into said transmission mode corresponding.
Said adjusting module specifically can comprise:
First adjustment unit; Be used for when said transmission mode is the orthogonal frequency division multiplex OFDM receive-transmit system; The IFFT module is connected respectively with the up-sampling module with the sign map module, so that the signal that spreads out of from the sign map module imports the up-sampling module into through the IFFT module; IFFT module and channel equalization module and channel decoding module are broken off respectively, so that the signal that spreads out of from the channel equalization module directly imports the channel decoding module into;
Second adjustment unit is used for when said transmission mode is single carrier frequency domain equalization SC-FDE receive-transmit system, IFFT module and sign map module and up-sampling module is broken off respectively, so that the signal that spreads out of from the sign map module directly imports the up-sampling module into; The IFFT module is connected respectively with the channel decoding module with the channel equalization module, so that the signal that spreads out of from the channel equalization module imports the channel decoding module into through the IFFT module;
The 3rd adjustment unit is used for when said transmission mode is SC-FDE emission, OFDM receiving system, IFFT module and sign map module and up-sampling module is broken off respectively, so that the signal that spreads out of from the sign map module directly imports the up-sampling module into; IFFT module and channel equalization module and channel decoding module are broken off respectively, so that the signal that spreads out of from the channel equalization module directly imports the channel decoding module into; With
The 4th adjustment unit; Be used for when said transmission mode is OFDM emission, SC-FDE receiving system; The IFFT module is connected respectively with the up-sampling module with the sign map module, so that the signal that spreads out of from the sign map module imports the up-sampling module into through the IFFT module; The IFFT module is connected respectively with the channel decoding module with the channel equalization module, so that the signal that spreads out of from the channel equalization module imports the channel decoding module into through the IFFT module.
Preferably; When said transmission mode is OFDM emission, SC-FDE receiving system; Said IFFT module is connected respectively with sign map module, up-sampling module, channel equalization module and channel decoding module, and the IFFT module is carried out the IFFT processing through multiplexing respectively to transmitting chain and the signal that receives link.
Optional; Said IFFT module comprises an IFFT submodule and the 2nd IFFT submodule; When said transmission mode is OFDM emission, SC-FDE receiving system; The one IFFT submodule is connected respectively with the up-sampling module with the sign map module, and the 2nd IFFT submodule is connected respectively with the channel decoding module with the channel equalization module.
Once more; The invention provides a kind of transmission equipment; Said transmission equipment has a cover functional module and an aforesaid transmission mode controller, and said functional module comprises channel coding module, sign map module, inverse fast Fourier transform IFFT module, up-sampling module, down sample module, synchronization module, fast Fourier transform FFT module, channel equalization module and channel decoding module; According to the Signal Processing order, in transmitting chain, comprise channel coding module, sign map module and up-sampling module successively, in receiving link, comprise down sample module, synchronization module, FFT module, channel equalization module and channel decoding module successively.
Transmission mode method of adjustment of the present invention, transmission mode controller and transmission equipment; Mapping relations through annexation between the transmission mode that presets and IFFT module and sign map module, the up-sampling module and between IFFT module and channel equalization module, the channel decoding module; Between adjustment IFFT module and sign map module, the up-sampling module and the annexation between IFFT module and channel equalization module, the channel decoding module, realized that a transmission equipment supports multiple transmission mode; In addition, through the IFFT module reuse, make transmission equipment need not increase new function block, the complexity of transmission equipment, cost, volume and power consumption can maintain a kind of level of transmission mode.
Description of drawings
Fig. 1 is the transmitting chain and reception link sketch map of existing OFDM transmission system;
Fig. 2 is the transmitting chain and reception link sketch map of existing SC-FDE transmission system;
Fig. 3 is the transmitting chain and reception link sketch map of OFDM receive-transmit system of the present invention;
Fig. 4 is the transmitting chain and reception link sketch map of SC-FDE receive-transmit system of the present invention;
Fig. 5 is the transmitting chain of SC-FDE emission of the present invention, OFDM receiving system and receives the link sketch map;
Fig. 6 is the transmitting chain of OFDM emission of the present invention, SC-FDE receiving system and receives the link sketch map;
Fig. 7 is the structural representation of transmission equipment of the present invention.
Embodiment
For make above-mentioned purpose of the present invention, feature and advantage can be more obviously understandable, below in conjunction with accompanying drawing and embodiment the embodiment of the invention done further detailed explanation.
Embodiment one
Present embodiment provides a kind of transmission mode method of adjustment of transmission equipment; Said transmission equipment has a cover functional module, and said functional module can comprise channel coding module, sign map module, IFFT module, up-sampling module, down sample module, synchronization module, FFT module, channel equalization module and channel decoding module; According to the Signal Processing order, in transmitting chain, comprise channel coding module, sign map module and up-sampling module successively, in receiving link, comprise down sample module, synchronization module, FFT module, channel equalization module and channel decoding module successively.Said method comprises the steps:
When transmission equipment need adopt certain transmission mode; According to the mapping relations of annexation between the transmission mode that presets and IFFT module and sign map module, the up-sampling module and between IFFT module and channel equalization module, the channel decoding module, with between IFFT module and sign map module, the up-sampling module and the annexation between IFFT module and channel equalization module, the channel decoding module be adjusted into said transmission mode corresponding.
At present; The transmission mode that transmission equipment is commonly used comprises the OFDM receive-transmit system; The SC-FDE receive-transmit system, SC-FDE emission, OFDM receiving system, and OFDM launches, the SC-FDE receiving system; For different transmission modes, between IFFT module and sign map module, the up-sampling module and the annexation between IFFT module and channel equalization module, the channel decoding module need adjustment.The mapping relations of transmission mode and annexation can be arranged in the register of transmission equipment in advance; When transmission equipment need adopt certain transmission mode; The transmission mode controller can go earlier to call in the said register said mapping relations, thereby confirms the annexation of IFFT module.
1, when said transmission mode is the OFDM receive-transmit system; Said according to mapping relations adjustment annexation specifically can for: the IFFT module is connected respectively with the up-sampling module with the sign map module, so that the signal that spreads out of from the sign map module imports the up-sampling module into through the IFFT module; IFFT module and channel equalization module and channel decoding module are broken off respectively, so that the signal that spreads out of from the channel equalization module directly imports the channel decoding module into.As shown in Figure 3, the annexation of pairing each functional module can for: according to the Signal Processing order, in transmitting chain, comprise channel coding module, sign map module, IFFT module and up-sampling module successively; In receiving link, comprise down sample module, synchronization module, FFT module, channel equalization module and channel decoding module successively.
2, when said transmission mode is the SC-FDE receive-transmit system; Said according to mapping relations adjustment annexation specifically can for: IFFT module and sign map module and up-sampling module are broken off respectively, so that the signal that spreads out of from the sign map module directly imports the up-sampling module into; The IFFT module is connected respectively with the channel decoding module with the channel equalization module, so that the signal that spreads out of from the channel equalization module imports the channel decoding module into through the IFFT module.As shown in Figure 4, the annexation of pairing each functional module can for: according to the Signal Processing order, in transmitting chain, comprise channel coding module, sign map module and up-sampling module successively; In receiving link, comprise down sample module, synchronization module, FFT module, channel equalization module, IFFT module and channel decoding module successively.
3, when said transmission mode is SC-FDE emission, OFDM receiving system; Said according to mapping relations adjustment annexation specifically can for: IFFT module and sign map module and up-sampling module are broken off respectively, so that the signal that spreads out of from the sign map module directly imports the up-sampling module into; IFFT module and channel equalization module and channel decoding module are broken off respectively, so that the signal that spreads out of from the channel equalization module directly imports the channel decoding module into.As shown in Figure 5, the annexation of pairing each functional module can for: according to the Signal Processing order, in transmitting chain, comprise channel coding module, sign map module and up-sampling module successively; In receiving link, comprise down sample module, synchronization module, FFT module, channel equalization module and channel decoding module successively.If comprise the IFFT module in the transmission system, can carry out bypass to this IFFT module and handle.
4, when said transmission mode is OFDM emission, SC-FDE receiving system; Said according to mapping relations adjustment annexation specifically can for: the IFFT module is connected respectively with the up-sampling module with the sign map module, so that the signal that spreads out of from the sign map module imports the up-sampling module into through the IFFT module; The IFFT module is connected respectively with the channel decoding module with the channel equalization module, so that the signal that spreads out of from the channel equalization module imports the channel decoding module into through the IFFT module.As shown in Figure 6, the annexation of pairing each functional module can for: according to the Signal Processing order, in transmitting chain, comprise channel coding module, sign map module, IFFT module and up-sampling module successively; In receiving link, comprise down sample module, synchronization module, FFT module, channel equalization module, IFFT module and channel decoding module successively.
Said IFFT module can be connected respectively with sign map module, up-sampling module, channel equalization module and channel decoding module, and the IFFT module is carried out the IFFT processing through multiplexing respectively to transmitting chain and the signal that receives link.Concrete, in the time division duplex transmission system, the asynchronism(-nization) that transmits and receives of transmission equipment, thus can realize the multiplexing of IFFT module through the mode of time-division; In FDD transmitting system, can the processing frequency of IFFT module be doubled, then through the time assign to realize the multiplexing of IFFT module.The mode that realizes also has a lot, and the present invention does not enumerate one by one.
Said IFFT module can comprise an IFFT submodule and the 2nd IFFT submodule, and an IFFT submodule and the 2nd IFFT submodule are two independently submodules.Wherein, an IFFT submodule is connected respectively with the up-sampling module with the sign map module, and the 2nd IFFT submodule is connected respectively with the channel decoding module with the channel equalization module.When transmission equipment adopts the transmission mode of OFDM receive-transmit system or SC-FDE receive-transmit system; One of them of the one IFFT submodule or the 2nd IFFT submodule participated in signal processing work; Another is by bypass; When transmission equipment adopted the transmission mode of SC-FDE emission, OFDM receiving system, an IFFT module and the 2nd IFFT module were all by bypass.
Because between corresponding IFFT modules of 4 kinds of transmission modes and sign map module, the up-sampling module and the annexation between IFFT module and channel equalization module, the channel decoding module; Promptly whether 4 kinds of corresponding IFFT modules of transmission mode insert in above-mentioned two positions; Therefore, said annexation can be represented through two bit as whether the IFFT module being inserted between sign map module and up-sampling module with first bit represent (for example to insert and represent with 1; Break off and representing) with 0; Whether the IFFT module inserted with second bit between channel equalization module and channel decoding module represent, the mapping relations of then above-mentioned 4 kinds of transmission modes and annexation can be expressed as 1---10,2---01; 3---00,4---11.Certainly can adopt other rules of correspondence between transmission mode and the annexation, not enumerate one by one here.
When concrete the realization, at least one pair of input, output pin can be set on the IFFT module, signal after the IFFT resume module can from input pin output pin output one to one.When transmission equipment adopts the transmission mode of OFDM receive-transmit system; Adjustment sign map module and up-sampling module are connected respectively on a pair of input and output pin of IFFT module; Realize the access of IFFT module in the transmitting chain, channel equalization module and channel decoding module are broken off also mutual connection with the pin of IFFT module respectively; When transmission equipment adopts the transmission mode of SC-FDE receive-transmit system; Adjustment sign map module and up-sampling module are broken off also mutual connection with the pin of IFFT module respectively; Channel equalization module and channel decoding module are connected respectively on a pair of input and output pin of IFFT module, realize receiving the access of IFFT module in the link; When transmission equipment adopts the transmission mode of SC-FDE emission, OFDM receiving system; Adjustment sign map module and up-sampling module are broken off also mutual connection with the pin of IFFT module respectively; And channel equalization module and channel decoding module break off and mutual connection with the pin of IFFT module respectively, realizes the bypass of IFFT module; When transmission equipment adopts the transmission mode of OFDM emission, SC-FDE receiving system; Adjustment sign map module and up-sampling module are connected respectively on a pair of input and output pin of IFFT module; Realize the access of IFFT module in the transmitting chain; And channel equalization module and channel decoding module are connected respectively to the IFFT module another on the input and output pin, realize receiving the access of IFFT module in the link.Certainly, those skilled in the art also can carry out control and treatment through switch is set in the relevant position.
Because transmitting chain adopts same IFFT module with the reception link; When supporting multiple transmission mode; Can also make the complexity of transmission equipment and the level that cost maintains a kind of transmission mode; And owing to do not increase new functional module, the volume of transmission equipment and power consumption also can maintain a kind of level of transmission mode.
The transmission mode method of adjustment of present embodiment; Mapping relations through annexation between the transmission mode that presets and IFFT module and sign map module, the up-sampling module and between IFFT module and channel equalization module, the channel decoding module; Between adjustment IFFT module and sign map module, the up-sampling module and the annexation between IFFT module and channel equalization module, the channel decoding module, realized that a transmission equipment supports multiple transmission mode; In addition, through the IFFT module reuse, make transmission equipment need not increase new function block, the complexity of transmission equipment, cost, volume and power consumption can maintain a kind of level of transmission mode.
Embodiment two
Present embodiment provides a kind of transmission mode controller of transmission equipment; Said transmission equipment has a cover functional module, and said functional module can comprise channel coding module, sign map module, IFFT module, up-sampling module, down sample module, synchronization module, FFT module, channel equalization module and channel decoding module; According to the Signal Processing order, in transmitting chain, comprise channel coding module, sign map module and up-sampling module successively, in receiving link, comprise down sample module, synchronization module, FFT module, channel equalization module and channel decoding module successively; Then said transmission mode controller comprises:
Adjusting module; Transmission equipment is used for when need adopt certain transmission mode; According to the mapping relations of annexation between the transmission mode that presets and IFFT module and sign map module, the up-sampling module and between IFFT module and channel equalization module, the channel decoding module, with between IFFT module and sign map module, the up-sampling module and the annexation between IFFT module and channel equalization module, the channel decoding module be adjusted into said transmission mode corresponding.
The mapping relations of transmission mode and annexation can be arranged in the register of transmission equipment in advance; When transmission equipment need adopt certain transmission mode; The transmission mode controller can go earlier to call in the said register said mapping relations, thereby confirms the annexation of IFFT module.
Said adjusting module can comprise:
First adjustment unit is used for when said transmission mode is the OFDM receive-transmit system, the IFFT module is connected respectively with the up-sampling module with the sign map module, so that the signal that spreads out of from the sign map module imports the up-sampling module into through the IFFT module; IFFT module and channel equalization module and channel decoding module are broken off respectively, so that the signal that spreads out of from the channel equalization module directly imports the channel decoding module into;
Second adjustment unit is used for when said transmission mode is the SC-FDE receive-transmit system, IFFT module and sign map module and up-sampling module is broken off respectively, so that the signal that spreads out of from the sign map module directly imports the up-sampling module into; The IFFT module is connected respectively with the channel decoding module with the channel equalization module, so that the signal that spreads out of from the channel equalization module imports the channel decoding module into through the IFFT module;
The 3rd adjustment unit is used for when said transmission mode is SC-FDE emission, OFDM receiving system, IFFT module and sign map module and up-sampling module is broken off respectively, so that the signal that spreads out of from the sign map module directly imports the up-sampling module into; IFFT module and channel equalization module and channel decoding module are broken off respectively, so that the signal that spreads out of from the channel equalization module directly imports the channel decoding module into;
The 4th adjustment unit; Be used for when said transmission mode is OFDM emission, SC-FDE receiving system; The IFFT module is connected respectively with the up-sampling module with the sign map module, so that the signal that spreads out of from the sign map module imports the up-sampling module into through the IFFT module; The IFFT module is connected respectively with the channel decoding module with the channel equalization module, so that the signal that spreads out of from the channel equalization module imports the channel decoding module into through the IFFT module.
When said transmission mode is OFDM emission, SC-FDE receiving system; Said IFFT module can be connected respectively with sign map module, up-sampling module, channel equalization module and channel decoding module, and the IFFT module is carried out the IFFT processing through multiplexing respectively to transmitting chain and the signal that receives link.
Said IFFT module also can comprise an IFFT submodule and the 2nd IFFT submodule; When said transmission mode is OFDM emission, SC-FDE receiving system; The one IFFT submodule is connected respectively with the up-sampling module with the sign map module, and the 2nd IFFT submodule is connected respectively with the channel decoding module with the channel equalization module.
Thus, same transmission equipment can compatible above-mentioned 4 kinds of transmission modes, have enriched the wireless communication mode of node, have guaranteed the connectivity of network.
The transmission equipment controller can be integrated in the transmission equipment, also can be independent of outside the transmission equipment, and the present invention does not do qualification to this.
The transmission mode controller of present embodiment; Mapping relations through annexation between the transmission mode that presets and IFFT module and sign map module, the up-sampling module and between IFFT module and channel equalization module, the channel decoding module; Between adjustment IFFT module and sign map module, the up-sampling module and the annexation between IFFT module and channel equalization module, the channel decoding module, realized that a transmission equipment supports multiple transmission mode; In addition, through the IFFT module reuse, make transmission equipment need not increase new function block, the complexity of transmission equipment, cost, volume and power consumption can maintain a kind of level of transmission mode.
Embodiment three
Present embodiment provides a kind of transmission equipment; As shown in Figure 7; Said transmission equipment has a cover functional module and like embodiment two described transmission mode controllers 1, said functional module can comprise channel coding module 10, sign map module 20, IFFT module 30, up-sampling module 40, down sample module 50, synchronization module 60, FFT module 70, channel equalization module 80 and channel decoding module 90; According to the Signal Processing order; In transmitting chain, comprise channel coding module 10, sign map module 20 and up-sampling module 40 successively, in receiving link, comprise down sample module 50, synchronization module 60, FFT module 70, channel equalization module 80 and channel decoding module 90 successively.
The transmission equipment of present embodiment; Mapping relations through annexation between the transmission mode that presets and IFFT module and sign map module, the up-sampling module and between IFFT module and channel equalization module, the channel decoding module; Between adjustment IFFT module and sign map module, the up-sampling module and the annexation between IFFT module and channel equalization module, the channel decoding module, realized that a transmission equipment supports multiple transmission mode; In addition, through the IFFT module reuse, make transmission equipment need not increase new function block, the complexity of transmission equipment, cost, volume and power consumption can maintain a kind of level of transmission mode.
Because transmission mode controller embodiment is more with the similar content of transmission mode method of adjustment embodiment with transmission equipment embodiment, that therefore introduces is simpler, and relevant part sees also method embodiment part.
Need to prove; In this article; Relational terms such as first and second grades only is used for an entity or operation are made a distinction with another entity or operation, and not necessarily requires or hint relation or the order that has any this reality between these entities or the operation.And; Term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability; Thereby make and comprise that process, method, article or the equipment of a series of key elements not only comprise those key elements; But also comprise other key elements of clearly not listing, or also be included as this process, method, article or equipment intrinsic key element.Under the situation that do not having much more more restrictions, the key element that limits by statement " comprising ... ", and be not precluded within process, method, article or the equipment that comprises said key element and also have other identical element.
The above is merely preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention.All any modifications of within spirit of the present invention and principle, being done, be equal to replacement, improvement etc., all be included in protection scope of the present invention.
Claims (12)
1. transmission mode method of adjustment; It is characterized in that; Transmission equipment has a cover functional module, and said functional module comprises channel coding module, sign map module, inverse fast Fourier transform IFFT module, up-sampling module, down sample module, synchronization module, fast Fourier transform FFT module, channel equalization module and channel decoding module; According to the Signal Processing order, in transmitting chain, comprise channel coding module, sign map module and up-sampling module successively, in receiving link, comprise down sample module, synchronization module, FFT module, channel equalization module and channel decoding module successively;
Then said method comprises:
When transmission equipment need adopt certain transmission mode; According to the mapping relations of annexation between the transmission mode that presets and IFFT module and sign map module, the up-sampling module and between IFFT module and channel equalization module, the channel decoding module, with between IFFT module and sign map module, the up-sampling module and the annexation between IFFT module and channel equalization module, the channel decoding module be adjusted into said transmission mode corresponding.
2. the method for claim 1 is characterized in that, when said transmission mode is the orthogonal frequency division multiplex OFDM receive-transmit system, saidly specifically comprises according to mapping relations adjustment annexation:
The IFFT module is connected respectively with the up-sampling module with the sign map module, so that the signal that spreads out of from the sign map module imports the up-sampling module into through the IFFT module; IFFT module and channel equalization module and channel decoding module are broken off respectively, so that the signal that spreads out of from the channel equalization module directly imports the channel decoding module into.
3. the method for claim 1 is characterized in that, when said transmission mode is single carrier frequency domain equalization SC-FDE receive-transmit system, saidly specifically comprises according to mapping relations adjustment annexation:
IFFT module and sign map module and up-sampling module are broken off respectively, so that the signal that spreads out of from the sign map module directly imports the up-sampling module into; The IFFT module is connected respectively with the channel decoding module with the channel equalization module, so that the signal that spreads out of from the channel equalization module imports the channel decoding module into through the IFFT module.
4. the method for claim 1 is characterized in that, when said transmission mode during for single carrier frequency domain equalization SC-FDE emission, orthogonal frequency division multiplex OFDM receiving system, saidly specifically comprises according to mapping relations adjustment annexation:
IFFT module and sign map module and up-sampling module are broken off respectively, so that the signal that spreads out of from the sign map module directly imports the up-sampling module into; IFFT module and channel equalization module and channel decoding module are broken off respectively, so that the signal that spreads out of from the channel equalization module directly imports the channel decoding module into.
5. the method for claim 1 is characterized in that, when said transmission mode is orthogonal frequency division multiplex OFDM emission, single carrier frequency domain equalization SC-FDE receiving system, saidly specifically comprises according to mapping relations adjustment annexation:
The IFFT module is connected respectively with the up-sampling module with the sign map module, so that the signal that spreads out of from the sign map module imports the up-sampling module into through the IFFT module; The IFFT module is connected respectively with the channel decoding module with the channel equalization module, so that the signal that spreads out of from the channel equalization module imports the channel decoding module into through the IFFT module.
6. method as claimed in claim 5; It is characterized in that; Said IFFT module is connected respectively with sign map module, up-sampling module, channel equalization module and channel decoding module, and the IFFT module is carried out the IFFT processing through multiplexing respectively to transmitting chain and the signal that receives link.
7. method as claimed in claim 5; It is characterized in that; Said IFFT module comprises an IFFT submodule and the 2nd IFFT submodule; Wherein, an IFFT submodule is connected respectively with the up-sampling module with the sign map module, and the 2nd IFFT submodule is connected respectively with the channel decoding module with the channel equalization module.
8. transmission mode controller; It is characterized in that; Transmission equipment has a cover functional module, and said functional module comprises channel coding module, sign map module, inverse fast Fourier transform IFFT module, up-sampling module, down sample module, synchronization module, fast Fourier transform FFT module, channel equalization module and channel decoding module; According to the Signal Processing order, in transmitting chain, comprise channel coding module, sign map module and up-sampling module successively, in receiving link, comprise down sample module, synchronization module, FFT module, channel equalization module and channel decoding module successively; Then said transmission mode controller comprises:
Adjusting module; Transmission equipment is used for when need adopt certain transmission mode; According to the mapping relations of annexation between the transmission mode that presets and IFFT module and sign map module, the up-sampling module and between IFFT module and channel equalization module, the channel decoding module, with between IFFT module and sign map module, the up-sampling module and the annexation between IFFT module and channel equalization module, the channel decoding module be adjusted into said transmission mode corresponding.
9. transmission mode controller as claimed in claim 8 is characterized in that, said adjusting module specifically comprises:
First adjustment unit; Be used for when said transmission mode is the orthogonal frequency division multiplex OFDM receive-transmit system; The IFFT module is connected respectively with the up-sampling module with the sign map module, so that the signal that spreads out of from the sign map module imports the up-sampling module into through the IFFT module; IFFT module and channel equalization module and channel decoding module are broken off respectively, so that the signal that spreads out of from the channel equalization module directly imports the channel decoding module into;
Second adjustment unit is used for when said transmission mode is single carrier frequency domain equalization SC-FDE receive-transmit system, IFFT module and sign map module and up-sampling module is broken off respectively, so that the signal that spreads out of from the sign map module directly imports the up-sampling module into; The IFFT module is connected respectively with the channel decoding module with the channel equalization module, so that the signal that spreads out of from the channel equalization module imports the channel decoding module into through the IFFT module;
The 3rd adjustment unit is used for when said transmission mode is SC-FDE emission, OFDM receiving system, IFFT module and sign map module and up-sampling module is broken off respectively, so that the signal that spreads out of from the sign map module directly imports the up-sampling module into; IFFT module and channel equalization module and channel decoding module are broken off respectively, so that the signal that spreads out of from the channel equalization module directly imports the channel decoding module into; With
The 4th adjustment unit; Be used for when said transmission mode is OFDM emission, SC-FDE receiving system; The IFFT module is connected respectively with the up-sampling module with the sign map module, so that the signal that spreads out of from the sign map module imports the up-sampling module into through the IFFT module; The IFFT module is connected respectively with the channel decoding module with the channel equalization module, so that the signal that spreads out of from the channel equalization module imports the channel decoding module into through the IFFT module.
10. transmission mode controller as claimed in claim 9; It is characterized in that; When said transmission mode is OFDM emission, SC-FDE receiving system; Said IFFT module is connected respectively with sign map module, up-sampling module, channel equalization module and channel decoding module, and the IFFT module is carried out the IFFT processing through multiplexing respectively to transmitting chain and the signal that receives link.
11. transmission mode controller as claimed in claim 9; It is characterized in that; Said IFFT module comprises an IFFT submodule and the 2nd IFFT submodule; When said transmission mode was OFDM emission, SC-FDE receiving system, an IFFT submodule was connected respectively with the up-sampling module with the sign map module, and the 2nd IFFT submodule is connected respectively with the channel decoding module with the channel equalization module.
12. transmission equipment; It is characterized in that; Said transmission equipment has a cover functional module and like each described transmission mode controller of claim 8-11, said functional module comprises channel coding module, sign map module, inverse fast Fourier transform IFFT module, up-sampling module, down sample module, synchronization module, fast Fourier transform FFT module, channel equalization module and channel decoding module; According to the Signal Processing order, in transmitting chain, comprise channel coding module, sign map module and up-sampling module successively, in receiving link, comprise down sample module, synchronization module, FFT module, channel equalization module and channel decoding module successively.
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